Function color_calc 

pub fn color_calc(query: &str) -> String

Color conversion and analysis — hex↔RGB↔HSL↔HSV, WCAG contrast, mix.

Commands: <hex> — auto-parse #RGB or #RRGGBB, show all formats rgb r g b — from RGB values hsl h s% l% — from HSL values hsv h s% v% — from HSV values <name> — lookup named CSS color mix <c1> <c2> — mix two colors at 50% contrast <c1> <c2> — WCAG contrast ratio between two colors