diff --git a/README.md b/README.md
index 42978b7..5a39679 100644
--- a/README.md
+++ b/README.md
@@ -588,6 +588,40 @@ $ FORCE_COLOR=0 node app.js           # force disable colors, non colored output
 $ FORCE_COLOR=1 node app.js > log.txt # force enable colors, output in file with ANSI codes
 ```
 
+#### How to force enable 256 colors
+
+If your environment supports 256 colors, but `ansis` detects only 16 or mono,
+you can manually set the `TERM` variable with standard values: `screen-256color` or `xterm-256color`.
+
+You can set the variable in CLI:
+
+```
+TERM=screen-256color node script.js
+```
+
+or directly in your script:
+
+```js
+process.env.TERM = 'screen-256color';
+```
+
+#### How to force enable truecolor
+
+If your environment supports truecolor, but `ansis` detects only 256, 16 or mono,
+you can manually set the `COLORTERM` variable with standard values: `truecolor` or `24bit`.
+
+You can set the variable in CLI:
+
+```
+COLORTERM=truecolor node script.js
+```
+
+or directly in your script:
+
+```js
+process.env.COLORTERM = 'truecolor';
+```
+
 ### CLI arguments
 
 Use arguments `--no-color` or `--color=false` to disable colors and `--color` to enable ones.
@@ -682,18 +716,18 @@ npm run compare
 
 [![Open in StackBlitz](https://developer.stackblitz.com/img/open_in_stackblitz.svg)](https://stackblitz.com/edit/compare-colorize-libraries?file=index.js)
 
-| Library<br><nobr>________________</nobr><br> - named import<br>- naming colors |  ANSI 16 colors  | ANSI 256<br>colors | True<br>Color | Chained<br>syntax | Nested<br>template strings | New<br>Line | Fallback to colors  | Supports<br>ENV vars<br>CLI flags                        |
-|:-------------------------------------------------------------------------------|:----------------:|:------------------:|:-------------:|:-----------------:|:--------------------------:|:-----------:|---------------------|:---------------------------------------------------------|
-| [`ansis`][ansis]<br><nobr>`✅ named import`</nobr><br>`✅ standard`              |        ✅         |         ✅          |       ✅       |         ✅         |             ✅              |      ✅      | →256<br>→16<br>→b&w | `NO_COLOR`<br>`FORCE_COLOR`<br>`--no-color`<br>`--color` |
-| [`chalk`][chalk]<br><nobr>`❌ named import`</nobr><br>`✅ standard`              |        ✅         |         ✅          |       ✅       |         ✅         |             ❌              |      ✅      | →256<br>→16<br>→b&w | `NO_COLOR`<br>`FORCE_COLOR`<br>`--no-color`<br>`--color` |
-| [`kolorist`][kolorist]<br><nobr>`✅ named import`</nobr><br>`❌ standard`        |        ✅         |         ✅          |       ✅       |         ❌         |             ❌              |      ❌      | →256<br>→b&w        | `NO_COLOR`<br>`FORCE_COLOR`                              |
-| [`cli-color`][cli-color]<br><nobr>`❌ named import`</nobr><br>`✅ standard`      |        ✅         |         ✅          |       ❌       |         ✅         |             ❌              |      ❌      | →16<br>→b&w         | `NO_COLOR`                                               |
-| [`colors-cli`][colors-cli]<br><nobr>`❌ named import`</nobr><br>`❌ standard`    |        ✅         |         ✅          |       ❌       |         ✅         |             ❌              |      ✅      | →b&w                | `--no-color`<br>`--color`                                |
-| [`colors.js`][colors.js]<br><nobr>`❌ named import`</nobr><br>`❌ standard`      |        ✅         |         ❌          |       ❌       |         ✅         |             ❌              |      ✅      | →b&w                | `FORCE_COLOR`<br>`--no-color`<br>`--color`               |
-| [`ansi-colors`][ansi-colors]<br><nobr>`❌ named import`</nobr><br>`✅ standard`  |        ✅         |         ❌          |       ❌       |         ✅         |             ❌              |      ✅      | ❌                   | `FORCE_COLOR`                                            |
-| [`colorette`][colorette]<br><nobr>`✅ named import`</nobr><br>`✅ standard`      |        ✅         |         ❌          |       ❌       |         ❌         |             ❌              |      ❌      | →b&w                | `NO_COLOR`<br>`FORCE_COLOR`<br>`--no-color`<br>`--color` |
-| [`kleur`][kleur]<br><nobr>`✅ named import`</nobr><br>`✅ standard`              | ❌<br> `8` colors |         ❌          |       ❌       |         ✅         |             ❌              |      ❌      | →b&w                | `NO_COLOR`<br>`FORCE_COLOR`                              |
-| [`picocolors`][picocolors]<br><nobr>`❌ named import`</nobr><br>`✅ standard`    | ❌<br> `8` colors |         ❌          |       ❌       |         ❌         |             ❌              |      ❌      | →b&w                | `NO_COLOR`<br>`FORCE_COLOR`<br>`--no-color`<br>`--color` |
+| Library<br><nobr>________________</nobr><br> - named import<br>- naming colors |  ANSI 16 colors   | ANSI 256<br>colors | True<br>Color | Chained<br>syntax | Nested<br>template strings | New<br>Line | Fallback to colors  | Supports<br>ENV vars<br>CLI flags                        |
+|:-------------------------------------------------------------------------------|:-----------------:|:------------------:|:-------------:|:-----------------:|:--------------------------:|:-----------:|---------------------|:---------------------------------------------------------|
+| [`ansis`][ansis]<br><nobr>`✅ named import`</nobr><br>`✅ standard`              |         ✅         |         ✅          |       ✅       |         ✅         |             ✅              |      ✅      | →256<br>→16<br>→b&w | `NO_COLOR`<br>`FORCE_COLOR`<br>`--no-color`<br>`--color` |
+| [`chalk`][chalk]<br><nobr>`❌ named import`</nobr><br>`✅ standard`              |         ✅         |         ✅          |       ✅       |         ✅         |             ❌              |      ✅      | →256<br>→16<br>→b&w | `NO_COLOR`<br>`FORCE_COLOR`<br>`--no-color`<br>`--color` |
+| [`kolorist`][kolorist]<br><nobr>`✅ named import`</nobr><br>`❌ standard`        |         ✅         |         ✅          |       ✅       |         ❌         |             ❌              |      ❌      | →256<br>→b&w        | `NO_COLOR`<br>`FORCE_COLOR`                              |
+| [`cli-color`][cli-color]<br><nobr>`❌ named import`</nobr><br>`✅ standard`      |         ✅         |         ✅          |       ❌       |         ✅         |             ❌              |      ❌      | →16<br>→b&w         | `NO_COLOR`                                               |
+| [`colors-cli`][colors-cli]<br><nobr>`❌ named import`</nobr><br>`❌ standard`    |         ✅         |         ✅          |       ❌       |         ✅         |             ❌              |      ✅      | →b&w                | `--no-color`<br>`--color`                                |
+| [`colors.js`][colors.js]<br><nobr>`❌ named import`</nobr><br>`❌ standard`      |         ✅         |         ❌          |       ❌       |         ✅         |             ❌              |      ✅      | →b&w                | `FORCE_COLOR`<br>`--no-color`<br>`--color`               |
+| [`ansi-colors`][ansi-colors]<br><nobr>`❌ named import`</nobr><br>`✅ standard`  |         ✅         |         ❌          |       ❌       |         ✅         |             ❌              |      ✅      | ❌                   | `FORCE_COLOR`                                            |
+| [`colorette`][colorette]<br><nobr>`✅ named import`</nobr><br>`✅ standard`      |         ✅         |         ❌          |       ❌       |         ❌         |             ❌              |      ❌      | →b&w                | `NO_COLOR`<br>`FORCE_COLOR`<br>`--no-color`<br>`--color` |
+| [`picocolors`][picocolors]<br><nobr>`❌ named import`</nobr><br>`✅ standard`    | ✅<br>since v1.1.0 |         ❌          |       ❌       |         ❌         |             ❌              |      ❌      | →b&w                | `NO_COLOR`<br>`FORCE_COLOR`<br>`--no-color`<br>`--color` |
+| [`kleur`][kleur]<br><nobr>`✅ named import`</nobr><br>`✅ standard`              | ❌<br> `8` colors  |         ❌          |       ❌       |         ✅         |             ❌              |      ❌      | →b&w                | `NO_COLOR`<br>`FORCE_COLOR`                              |
 
 > **Note**
 >
@@ -742,16 +776,16 @@ npm run compare
 
 | Npm package                  | Require size |                   Install size |                                                         Download size |
 |:-----------------------------|-------------:|-------------------------------:|----------------------------------------------------------------------:|
+| [`picocolors`][picocolors]   |       2.6 kB |      [11.4 kB][npm-picocolors] |       [2.6 kB](https://arve0.github.io/npm-download-size/#picocolors) |
+| [`kleur`][kleur]             |       2.7 kB |           [20.3 kB][npm-kleur] |            [6.0 kB](https://arve0.github.io/npm-download-size/#kleur) |
 | [`ansis`][ansis]             |       3.4 kB |           [11.4 kB][npm-ansis] |            [4.6 kB](https://arve0.github.io/npm-download-size/#ansis) |
-| [`chalk`][chalk]             |      16.4 kB |           [43.7 kB][npm-chalk] |           [13.1 kB](https://arve0.github.io/npm-download-size/#chalk) |
+| [`colorette`][colorette]     |       3.4 kB |       [17.0 kB][npm-colorette] |        [4.9 kB](https://arve0.github.io/npm-download-size/#colorette) |
+| [`ansi-colors`][ansi-colors] |       5.8 kB |     [26.1 kB][npm-ansi-colors] |      [8.5 kB](https://arve0.github.io/npm-download-size/#ansi-colors) |
 | [`kolorist`][kolorist]       |       6.8 kB |        [51.0 kB][npm-kolorist] |         [8.7 kB](https://arve0.github.io/npm-download-size/#kolorist) |
-| [`cli-color`][cli-color]     |      12.1 kB | [39.6 (754 kB)][npm-cli-color] | [13.8 (216 kB)](https://arve0.github.io/npm-download-size/#cli-color) |
 | [`colors-cli`][colors-cli]   |       8.7 kB |     [511.0 kB][npm-colors-cli] |     [361.7 kB](https://arve0.github.io/npm-download-size/#colors-cli) |
+| [`cli-color`][cli-color]     |      12.1 kB | [39.6 (754 kB)][npm-cli-color] | [13.8 (216 kB)](https://arve0.github.io/npm-download-size/#cli-color) |
+| [`chalk`][chalk]             |      16.4 kB |           [43.7 kB][npm-chalk] |           [13.1 kB](https://arve0.github.io/npm-download-size/#chalk) |
 | [`colors.js`][colors.js]     |      18.1 kB |       [39.5 kB][npm-colors.js] |          [11.0 kB](https://arve0.github.io/npm-download-size/#colors) |
-| [`ansi-colors`][ansi-colors] |       5.8 kB |     [26.1 kB][npm-ansi-colors] |      [8.5 kB](https://arve0.github.io/npm-download-size/#ansi-colors) |
-| [`kleur`][kleur]             |       2.7 kB |           [20.3 kB][npm-kleur] |            [6.0 kB](https://arve0.github.io/npm-download-size/#kleur) |
-| [`colorette`][colorette]     |       3.4 kB |       [17.0 kB][npm-colorette] |        [4.9 kB](https://arve0.github.io/npm-download-size/#colorette) |
-| [`picocolors`][picocolors]   |       2.1 kB |       [5.1 kB][npm-picocolors] |       [2.4 kB](https://arve0.github.io/npm-download-size/#picocolors) |
 
 **Require size**: The size of distributed code that will be loaded via `require` or `import` into your app.\
 **Install size:** The unpacked size of the npm package in the `node_modules/` directory, `(incl. dependencies)`.\
diff --git a/bench/package.json b/bench/package.json
index a82ddeb..c6d4366 100644
--- a/bench/package.json
+++ b/bench/package.json
@@ -19,7 +19,7 @@
     "colors-cli": "1.0.33",
     "kleur": "4.1.5",
     "kolorist": "1.8.0",
-    "picocolors": "1.0.0",
-    "vitest": "^1.4.0"
+    "picocolors": "1.1.0",
+    "vitest": "^2.1.1"
   }
 }
diff --git a/compare/package.json b/compare/package.json
index 5b55e84..2b14d87 100644
--- a/compare/package.json
+++ b/compare/package.json
@@ -15,6 +15,6 @@
     "colors-cli": "1.0.33",
     "kleur": "4.1.5",
     "kolorist": "1.8.0",
-    "picocolors": "1.0.0"
+    "picocolors": "1.1.0"
   }
 }
diff --git a/package.json b/package.json
index 305ed49..6cbfb88 100644
--- a/package.json
+++ b/package.json
@@ -87,17 +87,17 @@
     "node": ">=15"
   },
   "devDependencies": {
-    "@rollup/plugin-replace": "^5.0.5",
+    "@rollup/plugin-replace": "^6.0.1",
     "@rollup/plugin-terser": "^0.4.4",
     "@types/node": "^20.11.30",
-    "@vitest/coverage-v8": "^1.4.0",
+    "@vitest/coverage-v8": "^2.1.1",
     "ansis": "file:dist",
-    "prettier": "^3.2.5",
-    "rollup": "^4.13.0",
+    "prettier": "^3.3.3",
+    "rollup": "^4.22.5",
     "rollup-plugin-cleanup": "^3.2.1",
     "rollup-plugin-copy": "^3.5.0",
-    "rollup-plugin-dts": "^6.1.0",
-    "terser": "^5.30.0",
-    "vitest": "^1.4.0"
+    "rollup-plugin-dts": "^6.1.1",
+    "terser": "^5.34.1",
+    "vitest": "^2.1.1"
   }
 }
diff --git a/test/env/color-space.truecolor.js b/test/env/color-space.truecolor.js
index cfdbb42..85e2bc3 100644
--- a/test/env/color-space.truecolor.js
+++ b/test/env/color-space.truecolor.js
@@ -1,2 +1,2 @@
-// set env variable to simulate truecolor color space
-process.env.FORCE_COLOR = 'true';
\ No newline at end of file
+// set env variable to simulate truecolor color space in any test environment
+process.env.COLORTERM = 'truecolor';
\ No newline at end of file