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`color-core` is a comprehensive, type-safe color manipulation library for TypeScript and JavaScript applications. It provides a powerful toolkit for working with colors across multiple color spaces, making it an essential tool for developers working on projects that require advanced color handling.

Features

🎨 Support for 22 color spaces: RGB, sRGB, Adobe RGB, HEX, HSL, HSV, HSI, HWB, CMYK, LCH, LAB(D50), LAB(D60), XYZ(D50), XYZ(D65), YUV, Oklab, Oklch, HSLuv, HPLuv, CIExyY, and CIELuv
🔄 Easy color conversions between all supported formats
🌈 Generate color harmonies (complementary, analogous, triadic, tetradic, split-complementary, and more)
🛠 Powerful color manipulation tools (adjust lightness, saturation, hue, alpha, and more)
💪 Full TypeScript support with type safety
🔌 Seamless IDE integration
🧠 Color naming and information retrieval
🔦 Brightness calculation and light/dark color detection
🚀 Optimized for modern web applications

Installation

npm i color-core

Usage

color-core is designed to simplify color manipulation for developers and designers. Whether you're working on web applications, data visualization, or graphic design, this library provides the tools you need to handle colors efficiently across various formats and color spaces. Let's explore how to use color-core in your projects. The following examples demonstrate key functionalities of the library, from basic color conversions to more advanced color manipulations

The Color Class

The Color class is the heart of color-core. It provides a unified way to create, convert, and manipulate colors across different color spaces.

See it in action ⤵️

import { Color } from 'color-core';

// Create a color from different formats
const red = new Color('#ff0000');
const green = new Color({ r: 0, g: 255, b: 0 });
const blue = new Color({ h: 240, s: 100, l: 50 });

// Convert to different formats
console.log(red.toRgb());    // { r: 255, g: 0, b: 0 }
console.log(green.toHsl());  // { h: 120, s: 100, l: 50 }
console.log(blue.toHex());   // '#0000ff'

// Advanced color spaces
console.log(red.toOklab());   // { L: 0.627955, a: 0.224863, b: 0.125846 }
console.log(green.toCIExyY());// { x: 0.3, y: 0.6, Y: 0.715158 }
console.log(blue.toHSLuv()); // { h: 265.87, s: 100, l: 32.3 }

// Color manipulation
const lightRed = red.adjustLightness(20);
console.log(lightRed.toHex()); // '#ff6666'

const desaturatedGreen = green.adjustSaturation(-50);
console.log(desaturatedGreen.toHex()); // '#40bf40'

// Generate harmonies
const [complement] = red.complementary();
console.log(complement.toHex()); // '#00ffff'

const [color1, color2] = blue.splitComplementary();
console.log(color1.toHex(), color2.toHex()); // '#ffaa00' '#ff5500'

// Mix colors
const purple = red.mix(blue, 0.5);
console.log(purple.toHex()); // '#800080'

// Get color information
red.getName().then(name => console.log(name)); // 'Red'
red.getInfo().then(info => console.log(info));
// Returns: { name, hex, rgb, hsl, luminance, requestedHex }

// Check brightness and lightness
console.log(red.getBrightness()); // 76.245
console.log(red.isLight()); // false

Color Conversion Functions

For situations where you need quick, one-off color conversions, color-core offers standalone conversion functions. These can be useful when you don't need the full functionality of the Color class.

import { hexToRgb, rgbToHsl, rgbToOklab } from 'color-core';

const rgb = hexToRgb('#00ff00');
console.log(rgb);  // { r: 0, g: 255, b: 0 }

const hsl = rgbToHsl(rgb);
console.log(hsl);  // { h: 120, s: 100, l: 50 }

const oklab = rgbToOklab(rgb);
console.log(oklab);  // { L: 0.866440, a: -0.233888, b: 0.179498 }

API Reference

The following section provides a comprehensive overview of color-core's API. Each method and function is documented to help you understand its purpose and usage within your color manipulation workflows.You can find more detailed information in the official documentation.

Color Class

The Color class is the main entry point for color manipulations.

Constructor

new Color(color: string | RGB | HSL | HSV | CMYK | LAB | LCH | XYZ | YUV | Oklab | Oklch | HSLuv | HPLuv | CIExyY | HSI | HWB | AdobeRGB)

Creates a new Color instance from various color formats.

Conversion Methods

Method	Return Type	Description
`toRgb()`	RGB	Converts the color to RGB format
`toSrgb()`	SRGB	Converts the color to sRGB format
`toHex()`	string	Converts the color to HEX format
`toHsl()`	HSL	Converts the color to HSL format
`toHsv()`	HSV	Converts the color to HSV format
`toHsi()`	HSI	Converts the color to HSI format
`toHwb()`	HWB	Converts the color to HWB format
`toLch()`	LCH	Converts the color to LCH format
`toYuv()`	YUV	Converts the color to YUV format
`toCmyk()`	CMYK	Converts the color to CMYK format
`toOklab()`	Oklab	Converts the color to Oklab format
`toOklch()`	Oklch	Converts the color to Oklch format
`toHSLuv()`	HSLuv	Converts the color to HSLuv format
`toHPLuv()`	HPLuv	Converts the color to HPLuv format
`toCIELuv()`	LUV	Converts the color to CIELuv format
`toCIExyY()`	CIExyY	Converts the color to CIExyY format
`toAdobeRGB()`	AdobeRGB	Converts the color to Adobe RGB format
`toXyz()`	XYZ	Converts the color to XYZ (D65) format
`toXyzD50()`	XYZ	Converts the color to XYZ (D50) format
`toLab()`	LAB	Converts the color to LAB (D65) format
`toLabD50()`	LAB	Converts the color to LAB (D50) format

Harmony Methods

Method	Parameters	Return Type	Description
`complementary()`	None	[Color, Color]	Generates a complementary harmony
`analogous()`	angle?: number	[Color, Color, Color]	Generates an analogous harmony
`triadic()`	None	[Color, Color, Color]	Generates a triadic harmony
`tetradic()`	angle?: number	[Color, Color, Color, Color]	Generates a tetradic harmony
`splitComplementary()`	angle?: number	[Color, Color, Color]	Generates a split-complementary harmony
`doubleSplitComplementary()`	angle?: number	[Color, Color, Color, Color, Color]	Generates a double split-complementary harmony
`square()`	None	[Color, Color, Color, Color]	Generates a square harmony
`monochromatic()`	count?: number	Color[]	Generates a monochromatic harmony
`shades()`	count?: number	Color[]	Generates shades of the color
`tints()`	count?: number	Color[]	Generates tints of the color
`tones()`	count?: number	Color[]	Generates tones of the color

Manipulation Methods

Method	Parameters	Return Type	Description
`adjustLightness()`	amount: number	Color	Adjusts the lightness of the color
`adjustSaturation()`	amount: number	Color	Adjusts the saturation of the color
`adjustHue()`	amount: number	Color	Adjusts the hue of the color
`adjustAlpha()`	amount: number	Color	Adjusts the alpha of the color
`invert()`	None	Color	Inverts the color
`grayscale()`	None	Color	Converts the color to grayscale
`mix()`	color: Color, amount: number	Color	Mixes the color with another color

Utility Methods

Method	Parameters	Return Type	Description
`toString()`	includeAlpha?: boolean	string	Returns the color as a hex string
`equals(other: Color)`	other: Color	boolean	Checks if two colors are equal
`getBrightness()`	None	number	Calculates the perceived brightness (0-255)
`isLight()`	threshold?: number	boolean	Determines if the color is light or dark
`getName()`	None	Promise	Returns the name of the closest matching color
`getInfo()`	None	Promise	Returns detailed information about the color

Standalone Functions

Conversion Functions

Function	Parameters	Return Type	Description
`hexToRgb`	hex: string	RGB	Converts HEX to RGB
`rgbToHex`	rgb: RGB	string	Converts RGB to HEX
`rgbToHsl`	rgb: RGB	HSL	Converts RGB to HSL
`hslToRgb`	hsl: HSL	RGB	Converts HSL to RGB
`rgbToHsv`	rgb: RGB	HSV	Converts RGB to HSV
`hsvToRgb`	hsv: HSV	RGB	Converts HSV to RGB
`rgbToHsi`	rgb: RGB	HSI	Converts RGB to HSI
`hsiToRgb`	hsi: HSI	RGB	Converts HSI to RGB
`rgbToHwb`	rgb: RGB	HWB	Converts RGB to HWB
`hwbToRgb`	hwb: HWB	RGB	Converts HWB to RGB
`rgbToCmyk`	rgb: RGB	CMYK	Converts RGB to CMYK
`cmykToRgb`	cmyk: CMYK	RGB	Converts CMYK to RGB
`rgbToXyz`	rgb: RGB	XYZ	Converts RGB to XYZ (D65)
`xyzToRgb`	xyz: XYZ	RGB	Converts XYZ to RGB (D65)
`rgbToXyzD50`	rgb: RGB	XYZ	Converts RGB to XYZ (D50)
`xyzD50ToRgb`	xyz: XYZ	RGB	Converts XYZ (D50) to RGB
`xyzD65ToD50`	xyz: XYZ	XYZ	Converts XYZ from D65 to D50
`xyzD50ToD65`	xyz: XYZ	XYZ	Converts XYZ from D50 to D65
`rgbToLab`	rgb: RGB	LAB	Converts RGB to LAB (D65)
`labToRgb`	lab: LAB	RGB	Converts LAB to RGB (D65)
`rgbToLabD50`	rgb: RGB	LAB	Converts RGB to LAB (D50)
`labD50ToRgb`	lab: LAB	RGB	Converts LAB (D50) to RGB
`rgbToLch`	rgb: RGB	LCH	Converts RGB to LCH
`lchToRgb`	lch: LCH	RGB	Converts LCH to RGB
`rgbToOklab`	rgb: RGB	Oklab	Converts RGB to Oklab
`oklabToRgb`	oklab: Oklab	RGB	Converts Oklab to RGB
`rgbToOklch`	rgb: RGB	Oklch	Converts RGB to Oklch
`oklchToRgb`	oklch: Oklch	RGB	Converts Oklch to RGB
`rgbToHPLuv`	rgb: RGB	HPLuv	Converts RGB to HPLuv
`hpluvToRgb`	hpluv: HPLuv	RGB	Converts HPLuv to RGB
`rgbToHSLuv`	rgb: RGB	HSLuv	Converts RGB to HSLuv
`hsluvToRgb`	hsluv: HSLuv	RGB	Converts HSLuv to RGB
`rgbToCIExyY`	rgb: RGB	CIExyY	Converts RGB to CIE xyY
`ciexyYToRgb`	ciexyY: CIExyY	RGB	Converts CIE xyY to RGB
`rgbToCIELuv`	rgb: RGB	CIELuv	Converts RGB to CIE Luv
`cieLuvToRgb`	cieLuv: CIELuv	RGB	Converts CIE Luv to RGB
`rgbToYuv`	rgb: RGB	YUV	Converts RGB to YUV
`yuvToRgb`	yuv: YUV	RGB	Converts YUV to RGB
`rgbToSrgb`	rgb: RGB	RGB	Converts RGB to sRGB
`srgbToRgb`	rgb: RGB	RGB	Converts sRGB to RGB
`rgbToAdobeRGB`	rgb: RGB	RGB	Converts RGB to Adobe RGB
`adobeRGBToRGB`	rgb: RGB	RGB	Converts Adobe RGB to RGB

Harmony Functions

Function	Parameters	Return Type	Description
`complementary`	color: Color	[Color, Color]	Generates a complementary harmony
`analogous`	color: Color, angle?	[Color, Color, Color]	Generates an analogous harmony
`triadic`	color: Color	[Color, Color, Color]	Generates a triadic harmony
`tetradic`	color: Color, angle?	[Color, Color, Color, Color]	Generates a tetradic harmony
`splitComplementary`	color: Color, angle?	[Color, Color, Color]	Generates a split-complementary harmony
`doubleSplitComplementary`	color: Color, angle?	[Color, Color, Color, Color, Color]	Generates a double split-complementary harmony
`square`	color: Color	[Color, Color, Color, Color]	Generates a square harmony
`monochromatic`	color: Color, count?	Color[]	Generates a monochromatic harmony
`shades`	color: Color, count?	Color[]	Generates shades of the color
`tints`	color: Color, count?	Color[]	Generates tints of the color
`tones`	color: Color, count?	Color[]	Generates tones of the color

Manipulation Functions

Function	Parameters	Return Type	Description
`adjustLightness`	color: Color, amount: number	Color	Adjusts the lightness of the color
`adjustSaturation`	color: Color, amount: number	Color	Adjusts the saturation of the color
`adjustHue`	color: Color, amount: number	Color	Adjusts the hue of the color
`adjustAlpha`	color: Color, amount: number	Color	Adjusts the alpha of the color
`invert`	color: Color	Color	Inverts the color
`grayscale`	color: Color	Color	Converts the color to grayscale
`mix`	color1: Color, color2: Color, amount: number	Color	Mixes two colors

Types

type RGB = { r: number; g: number; b: number; a?: number };
type SRGB = { r: number; g: number; b: number };
type HSL = { h: number; s: number; l: number; a?: number };
type HSV = { h: number; s: number; v: number; a?: number };
type CMYK = { c: number; m: number; y: number; k: number };
type LAB = { l: number; a: number; b: number };
type LCH = { l: number; c: number; h: number };
type XYZ = { x: number; y: number; z: number };
type YUV = { y: number; u: number; v: number };
type Oklab = { L: number; a: number; b: number };
type Oklch = { L: number; C: number; h: number };
type HPLuv = { h: number; p: number; l: number };
type HSLuv = { h: number; s: number; l: number };
type CIExyY = { x: number; y: number; Y: number };
type CIELuv = { L: number; u: number; v: number };
type HSI = { h: number; s: number; i: number };
type HWB = { h: number; w: number; b: number };
type AdobeRGB = { r: number; g: number; b: number };

Examples

These practical examples demonstrate how to use various features of color-core to solve common color-related tasks. Feel free to adapt these examples to your specific needs.

Color Manipulation

import { Color } from 'color-core';

const color = new Color('#ff0000');

// Lighten the color
const lighterColor = color.adjustLightness(20);
console.log(lighterColor.toHex()); // '#ff6666'

// Desaturate the color
const desaturatedColor = color.adjustSaturation(-50);
console.log(desaturatedColor.toHex()); // '#bf4040'

// Change the hue
const hueShiftedColor = color.adjustHue(120);
console.log(hueShiftedColor.toHex()); // '#00ff00'

// Invert the color
const invertedColor = color.invert();
console.log(invertedColor.toHex()); // '#00ffff'

// Convert to grayscale
const grayscaleColor = color.grayscale();
console.log(grayscaleColor.toHex()); // '#4d4d4d'

// Mix with another color
const mixedColor = color.mix(new Color('#0000ff'), 0.5);
console.log(mixedColor.toHex()); // '#800080'

// Get color name
color.getName().then(name => console.log(name)); // 'Red'

// Get color information
color.getInfo().then(info => console.log(info));
// Returns: { name, hex, rgb, hsl, luminance, requestedHex }

// Check brightness and if the color is light
console.log(color.getBrightness()); // 76.245
console.log(color.isLight()); // false

---

Advanced Usage

The advanced usage section covers more complex scenarios, including working with less common color spaces and generating sophisticated color harmonies. These examples showcase the depth of color-core's capabilities.

Working with Different Color Spaces

import { Color } from 'color-core';

// Create a color in Oklab space
const oklabColor = new Color({ L: 0.627955, a: 0.224863, b: 0.125846 });
console.log(oklabColor.toHex()); // '#ff0000'

// Convert to CIE xyY
const xyYColor = oklabColor.toCIExyY();
console.log(xyYColor); // { x: 0.64, y: 0.33, Y: 0.2126 }

// Create a color in HSLuv space
const hsluvColor = new Color({ h: 12.177, s: 100, l: 53.237 });
console.log(hsluvColor.toRgb()); // { r: 255, g: 0, b: 0 }

// Convert to Adobe RGB
const adobeRGBColor = hsluvColor.toAdobeRGB();
console.log(adobeRGBColor); // { r: 255, g: 0, b: 0 }

Color Harmonies

import { Color } from 'color-core';

const baseColor = new Color('#ff0000');

// Generate complementary color
const [complement] = baseColor.complementary();
console.log(complement.toHex()); // '#00ffff'

// Generate analogous colors
const [analog1, analog2] = baseColor.analogous();
console.log(analog1.toHex(), analog2.toHex()); // '#ff8000' '#ff0080'

// Generate triadic colors
const [triad1, triad2] = baseColor.triadic();
console.log(triad1.toHex(), triad2.toHex()); // '#00ff00' '#0000ff'

// Generate tetradic colors
const [tetra1, tetra2, tetra3] = baseColor.tetradic();
console.log(tetra1.toHex(), tetra2.toHex(), tetra3.toHex()); // '#80ff00' '#00ffff' '#8000ff'

// Generate split-complementary colors
const [split1, split2] = baseColor.splitComplementary();
console.log(split1.toHex(), split2.toHex()); // '#00ff80' '#0080ff'

// Generate shades
const shades = baseColor.shades(5);
shades.forEach(shade => console.log(shade.toHex()));
// '#ff0000' '#cc0000' '#990000' '#660000' '#330000'

// Generate tints
const tints = baseColor.tints(5);
tints.forEach(tint => console.log(tint.toHex()));
// '#ff0000' '#ff3333' '#ff6666' '#ff9999' '#ffcccc'

As you become more familiar with color-core, you'll likely discover additional ways to leverage its functionality in your projects. The library's extensive color space support and manipulation tools provide a robust foundation for a wide range of color-related tasks.

Versioning

This project follows Semantic Versioning. For the versions available, see the tags on this repository.

Contributing

Contributions are welcome and greatly appreciated!

License

This project is licensed under the MIT License - see the LICENSE file for details.

Support

If you're having any problem, please raise an issue on GitHub and I will be happy to help.

Acknowledgements

HSLuv & HPLuv Conversions by Alexei Boronine

Oklab & Oklch Math Used by Björn Ottosson

Color Name API by meodai

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Features

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The Color Class

Color Conversion Functions

API Reference

Color Class

Constructor

Conversion Methods

Harmony Methods

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Conversion Functions

Harmony Functions

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Usage

The Color Class

Color Conversion Functions

API Reference

Color Class

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Conversion Methods

Harmony Methods

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Utility Methods

Standalone Functions

Conversion Functions

Harmony Functions

Manipulation Functions

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Examples

Color Manipulation

Advanced Usage

Working with Different Color Spaces

Color Harmonies

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