Colors

Color property macros like css::color and css::fill and the like have shorthands for full-alpha RGB colors as well as grayscale.

css::color::rgb(0xFF_00_00), // same as css::color::rgba(0xFF_00_00_FF) or #F00 in css
css::color::gray(0xAD), // same as css::color::rgba(0xAD_AD_AD_FF) or #ADADAD in css

CSS named colors also can be used

css::color::rgba(css::colors::PALEVIOLETRED),
css::color::rgba(css::colors::GREEN),