Function applyShade

apps/sim/lib/pptx-renderer/utils/color.ts:51–59

(hex: string, shade: number)

 * shade: 0-100000 where 100000 = original color, 0 = fully black.
 */
export function applyShade(hex: string, shade: number): string {
  const { r, g, b } = hexToRgb(hex)
  const s = shade / 100000
  return rgbToHex(
    linearToSrgb(srgbToLinear(r) * s),
    linearToSrgb(srgbToLinear(g) * s),
    linearToSrgb(srgbToLinear(b) * s)
  )
}

/**
 * Apply luminance modulation.