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convert-to-oklch

★ 145 Open GitHub ↗

CLI tool that converts rgb, rgba, hex, hsl and hsla to oklch in specified CSS files.

// repository documentation

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# convert-to-oklch

CLI tool that converts `rgb()`, `rgba()`, hex, `hsl()` and `hsla()` colors to [**oklch()**](https://developer.mozilla.org/en-US/docs/Web/CSS/color_value/oklch) in specified CSS files.

```sh
npx convert-to-oklch ./src/**/*.css
```

```diff
.header {
- background: rgb(102, 173, 221);
+ background: oklch(72% 0.1 239.8);
}
```

`oklch()` provides better readability since it uses `lightness`, `chroma`, and `hue` components (closer to how people think and work with colors) instead of “magic tokens” like `#4287f5`. In contrast with `hsl()`, OKLCH has no issues with contrast and a11y.

Don’t forget to add `postcss-preset-env` to PostCSS to have `oklch()` polyfill.

# Precision of conversion

After conversion, the value of each color component is rounded:

```diff
- oklch(60.66305848755579% 0.11082513148527705 250.4762110872339 / 0.4)
+ oklch(60.7% 0.11 250 / 0.4)

// l - up to 1 digit after the decimal point
// c - up to 3 digits after the decimal point
// h - up to 1 digit after the decimal point
```

You can also specify precision of color conversion by using `-p` or `--precision` option. Available values are 1-21 inclusive.

Conversion is done with [colorjs](https://colorjs.io/) package by [Lea Verou](https://github.com/LeaVerou).

```bash
npx convert-to-oklch ./src/*.css -p 2
```

# Custom properties

Colors that contain custom properties inside are ignored:

```css
a {
  color: rgb(102, 173, 221, var(--opacity));
}
```

In this case the color will not be converted.

# More

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