Function shift

packages/ui/src/theme/color.ts:248–255

(color: HexColor, value: { l?: number; c?: number; h?: number })

}

export function shift(color: HexColor, value: { l?: number; c?: number; h?: number }): HexColor {
  const base = hexToOklch(color)
  return oklchToHex({
    l: base.l + (value.l ?? 0),
    c: base.c * (value.c ?? 1),
    h: base.h + (value.h ?? 0),
  })
}

export function contrastRatio(foreground: HexColor, background: HexColor) {
  const linear = (c: number) => (c <= 0.03928 ? c / 12.92 : ((c + 0.055) / 1.055) ** 2.4)