Function applySatMod

apps/sim/lib/pptx-renderer/utils/color.ts:92–98

(hex: string, satMod: number)

 * Multiplies the S channel of HSL.
 */
export function applySatMod(hex: string, satMod: number): string {
  const { r, g, b } = hexToRgb(hex)
  const { h, s, l } = rgbToHsl(r, g, b)
  const newS = Math.max(0, Math.min(1, s * (satMod / 100000)))
  const rgb = hslToRgb(h, newS, l)
  return rgbToHex(rgb.r, rgb.g, rgb.b)
}

/**
 * Apply hue modulation.