message: doc: improved documentation for color macro
diff: //! ```
  use crate::*;
  -/// Get `hsluv` value for the given color.
  +/// Create a `static` `HSluv` color from a color name, hue, saturation and lightness.
  macro_rules! color {
  ($color:ident => $h:literal, $s:literal, $l:literal) => {
  pub static $color: HSLuv = hsluv!($h, $s, $l);
  