Function applyTint

apps/sim/lib/pptx-renderer/utils/color.ts:34–45

(hex: string, tint: number)

 * PowerPoint performs the blend in linear RGB space for perceptual correctness.
 */
export function applyTint(hex: string, tint: number): string {
  const { r, g, b } = hexToRgb(hex)
  const t = tint / 100000
  const rl = srgbToLinear(r)
  const gl = srgbToLinear(g)
  const bl = srgbToLinear(b)
  return rgbToHex(
    linearToSrgb(rl * t + 1.0 * (1 - t)),
    linearToSrgb(gl * t + 1.0 * (1 - t)),
    linearToSrgb(bl * t + 1.0 * (1 - t))
  )
}

/**
 * Apply shade modifier (mix toward black in linear RGB space).