1. LCH and Lab color values

    The `lch()` and `lab()` color functions are based on the CIE LAB color space, representing colors in a way that closely matches human perception and provides access to a wider spectrum of colors than offered by the usual RGB color space.

  2. types: <color>: `lch()` (lch color model): mix `<percentage>` and `<number>` in parameters

  3. types: <color>: `lch()` (lch color model): relative lch colors

  4. types: <color>: `oklch()` (oklch color model)

  5. types: <color>: `oklch()` (oklch color model): mix `<percentage>` and `<number>` in parameters

  6. types: <color>: `oklch()` (oklch color model): relative oklch colors