1. CSS Relative color syntax

    Relative color syntax in CSS allows a color to be defined relative to another color using the `from` keyword and optionally `calc()` for any of the color values.

  2. types: `<color>`: `hsl()` (hsl color model): relative hsl colors

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

  4. types: `<color>`: `lab()` (lab color model): relative lab colors

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

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

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

  8. types: `<color>`: `rgb()` (rgb color model): relative rgb colors