Function rgbToHsl

apps/sim/lib/colors/convert.ts:31–58

(r: number, g: number, b: number)

/** Convert RGB (0-255) to HSL (h: 0-360, s: 0-1, l: 0-1). */
export function rgbToHsl(r: number, g: number, b: number): { h: number; s: number; l: number } {
  const rn = r / 255
  const gn = g / 255
  const bn = b / 255
  const max = Math.max(rn, gn, bn)
  const min = Math.min(rn, gn, bn)
  const l = (max + min) / 2
  let h = 0
  let s = 0

  if (max !== min) {
    const d = max - min
    s = l > 0.5 ? d / (2 - max - min) : d / (max + min)
    switch (max) {
      case rn:
        h = ((gn - bn) / d + (gn < bn ? 6 : 0)) * 60
        break
      case gn:
        h = ((bn - rn) / d + 2) * 60
        break
      case bn:
        h = ((rn - gn) / d + 4) * 60
        break
    }
  }

  return { h, s, l }
}

/** Convert HSL (h: 0-360, s: 0-1, l: 0-1) to RGB (0-255). */
export function hslToRgb(h: number, s: number, l: number): { r: number; g: number; b: number } {