[Vis Colors] Update legacy seed colors to use ouiPaletteColorBlind() (

#4348)

Signed-off-by: Manasvini B Suryanarayana <manasvis@amazon.com>

CHANGELOG.md

@@ -68,6 +68,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - [Vis Colors] [Maps] Replace hardcoded color to OUI color in `maps_legacy` plugin ([#4294](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/4294))
 - [Vis Colors] [TSVB] Update default color in `vis_type_timeseries` to use `ouiPaletteColorBlind()[0]`([#4363](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/4363))
 - [Vis Colors] [Timeline] Replace `vis_type_timeline` colors with `ouiPaletteColorBlind()` ([#4366](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/4366))
+- [Vis Colors] Update legacy seed colors to use `ouiPaletteColorBlind()` ([#4348](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/4348))
 
 ### 🔩 Tests
 

src/plugins/charts/public/services/colors/color_palette.ts

@@ -29,48 +29,16 @@
  */
 
 import _ from 'lodash';
-import { hsl } from 'color';
 
-import { seedColors } from './seed_colors';
-
-const offset = 300; // Hue offset to start at
-
-const fraction = function (goal: number) {
-  const walkTree = (numerator: number, denominator: number, bytes: number[]): number => {
-    if (bytes.length) {
-      return walkTree(numerator * 2 + (bytes.pop() ? 1 : -1), denominator * 2, bytes);
-    } else {
-      return numerator / denominator;
-    }
-  };
-
-  const b = (goal + 2)
-    .toString(2)
-    .split('')
-    .map(function (num) {
-      return parseInt(num, 10);
-    });
-  b.shift();
-
-  return walkTree(1, 2, b);
-};
+import { euiPaletteColorBlind } from '@elastic/eui';
 
 /**
- * Generates an array of hex colors the length of the input number.
- * If the number is greater than the length of seed colors available,
- * new colors are generated up to the value of the input number.
+ * Generates an array of hex colors the length of the input number
  */
 export function createColorPalette(num: number): string[] {
   if (!_.isNumber(num)) {
     throw new TypeError('ColorPaletteUtilService expects a number');
   }
 
-  const colors = seedColors;
-  const seedLength = seedColors.length;
-
-  _.times(num - seedLength, function (i) {
-    colors.push(hsl((fraction(i + seedLength + 1) * 360 + offset) % 360, 50, 50).hex());
-  });
-
-  return colors;
+  return euiPaletteColorBlind({ rotations: Math.ceil(num / 10), direction: 'both' }).slice(0, num);
 }

src/plugins/charts/public/services/colors/colors.test.ts

@@ -30,7 +30,7 @@
 
 import { coreMock } from '../../../../../core/public/mocks';
 import { COLOR_MAPPING_SETTING } from '../../../common';
-import { seedColors } from './seed_colors';
+import { euiPaletteColorBlind } from '@elastic/eui';
 import { ColorsService } from './colors';
 
 // Local state for config
@@ -138,7 +138,7 @@ describe('Vislib Color Service', () => {
   });
 
   it('should return the first hex color in the seed colors array', () => {
-    expect(color(arr[0])).toBe(seedColors[0]);
+    expect(color(arr[0])).toBe(euiPaletteColorBlind()[0]);
   });
 
   it('should return the value from the mapped colors', () => {

src/plugins/charts/public/services/colors/colors.ts

@@ -32,8 +32,8 @@ import _ from 'lodash';
 
 import { CoreSetup } from 'opensearch-dashboards/public';
 
+import { euiPaletteColorBlind } from '@elastic/eui';
 import { MappedColors } from './mapped_colors';
-import { seedColors } from './seed_colors';
 
 /**
  * Accepts an array of strings or numbers that are used to create a
@@ -44,7 +44,7 @@ import { seedColors } from './seed_colors';
 export class ColorsService {
   private _mappedColors?: MappedColors;
 
-  public readonly seedColors = seedColors;
+  public readonly seedColors = euiPaletteColorBlind();
 
   public get mappedColors() {
     if (!this._mappedColors) {

src/plugins/charts/public/services/colors/colors_palette.test.ts

@@ -28,8 +28,8 @@
  * under the License.
  */
 
-import { seedColors } from './seed_colors';
 import { createColorPalette } from './color_palette';
+import { euiPaletteColorBlind } from '@elastic/eui';
 
 describe('Color Palette', () => {
   const num1 = 45;
@@ -46,6 +46,12 @@ describe('Color Palette', () => {
     colorPalette = createColorPalette(num1);
   });
 
+  function isHexValue(value: string): boolean {
+    // Check if the hex value is valid.
+    const regex = /^#[0-9a-fA-F]{3}|[0-9a-fA-F]{6}$/;
+    return regex.test(value) ? true : false;
+  }
+
   it('should throw an error if input is not a number', () => {
     expect(() => {
       // @ts-expect-error
@@ -91,18 +97,21 @@ describe('Color Palette', () => {
   });
 
   it('should return the seed color array when input length is 72', () => {
-    expect(createColorPalette(num2)[71]).toBe(seedColors[71]);
+    expect(createColorPalette(num2).length).toBe(num2);
+    expect(isHexValue(createColorPalette(num2)[71])).toBe(true);
   });
 
   it('should return an array of the same length as the input when input is greater than 72', () => {
     expect(createColorPalette(num3).length).toBe(num3);
   });
 
   it('should create new darker colors when input is greater than 72', () => {
-    expect(createColorPalette(num3)[72]).not.toEqual(seedColors[0]);
+    expect(createColorPalette(num3)[72]).not.toEqual(euiPaletteColorBlind()[0]);
   });
 
   it('should create new colors and convert them correctly', () => {
-    expect(createColorPalette(num3)[72]).toEqual('#404ABF');
+    expect(createColorPalette(num3).length).toBe(num3);
+    expect(createColorPalette(num3)[72]).not.toEqual(euiPaletteColorBlind()[9]);
+    expect(isHexValue(createColorPalette(num3)[89])).toBe(true);
   });
 });

src/plugins/charts/public/services/colors/mapped_colors.test.ts

@@ -33,7 +33,7 @@ import Color from 'color';
 
 import { coreMock } from '../../../../../core/public/mocks';
 import { COLOR_MAPPING_SETTING } from '../../../common';
-import { seedColors } from './seed_colors';
+import { euiPaletteColorBlind } from '@elastic/eui';
 import { MappedColors } from './mapped_colors';
 
 // Local state for config
@@ -65,31 +65,31 @@ describe('Mapped Colors', () => {
   });
 
   it('should not include colors used by the config', () => {
-    const newConfig = { bar: seedColors[0] };
+    const newConfig = { bar: euiPaletteColorBlind()[9] };
     config.set(COLOR_MAPPING_SETTING, newConfig);
 
     const arr = ['foo', 'baz', 'qux'];
     mappedColors.mapKeys(arr);
 
     const colorValues = _(mappedColors.mapping).values();
-    expect(colorValues).not.toContain(seedColors[0]);
+    expect(colorValues).not.toContain(euiPaletteColorBlind()[9]);
     expect(colorValues.uniq().size()).toBe(arr.length);
   });
 
   it('should create a unique array of colors even when config is set', () => {
-    const newConfig = { bar: seedColors[0] };
+    const newConfig = { bar: euiPaletteColorBlind()[9] };
     config.set(COLOR_MAPPING_SETTING, newConfig);
 
     const arr = ['foo', 'bar', 'baz', 'qux'];
     mappedColors.mapKeys(arr);
 
     const expectedSize = _(arr).difference(_.keys(newConfig)).size();
     expect(_(mappedColors.mapping).values().uniq().size()).toBe(expectedSize);
-    expect(mappedColors.get(arr[0])).not.toBe(seedColors[0]);
+    expect(mappedColors.get(arr[0])).not.toBe(euiPaletteColorBlind()[9]);
   });
 
   it('should treat different formats of colors as equal', () => {
-    const color = new Color(seedColors[0]);
+    const color = new Color(euiPaletteColorBlind()[9]);
     const rgb = `rgb(${color.red()}, ${color.green()}, ${color.blue()})`;
     const newConfig = { bar: rgb };
     config.set(COLOR_MAPPING_SETTING, newConfig);
@@ -99,8 +99,8 @@ describe('Mapped Colors', () => {
 
     const expectedSize = _(arr).difference(_.keys(newConfig)).size();
     expect(_(mappedColors.mapping).values().uniq().size()).toBe(expectedSize);
-    expect(mappedColors.get(arr[0])).not.toBe(seedColors[0]);
-    expect(mappedColors.get('bar')).toBe(seedColors[0]);
+    expect(mappedColors.get(arr[0])).not.toBe(euiPaletteColorBlind()[9]);
+    expect(mappedColors.get('bar')).toBe(euiPaletteColorBlind()[9].toLowerCase());
   });
 
   it('should have a flush method that moves the current map to the old map', function () {

test/functional/apps/dashboard/dashboard_state.js

@@ -277,14 +277,14 @@ export default function ({ getService, getPageObjects }) {
 
           await retry.try(async () => {
             const pieSliceStyle = await pieChart.getPieSliceStyle('80,000');
-            // The default green color that was stored with the visualization before any dashboard overrides.
-            expect(pieSliceStyle.indexOf('rgb(87, 193, 123)')).to.be.greaterThan(0);
+            // The default color that was stored with the visualization before any dashboard overrides.
+            expect(pieSliceStyle.indexOf('rgb(84, 179, 153)')).to.be.greaterThan(0);
           });
         });
 
         it('resets the legend color as well', async function () {
           await retry.try(async () => {
-            const colorExists = await PageObjects.visChart.doesSelectedLegendColorExist('#57c17b');
+            const colorExists = await PageObjects.visChart.doesSelectedLegendColorExist('#54B399');
             expect(colorExists).to.be(true);
           });
         });