Function rgbToCssColor

packages/backend/src/common/color.ts:32–59

(color: RGB | RGBA, alpha: number = 1)

 * @returns A CSS color string
 */
export const rgbToCssColor = (color: RGB | RGBA, alpha: number = 1): string => {
  // Special cases for common colors
  if (color.r === 1 && color.g === 1 && color.b === 1 && alpha === 1) {
    return "white";
  }

  if (color.r === 0 && color.g === 0 && color.b === 0 && alpha === 1) {
    return "black";
  }

  // Return hex when possible (no transparency)
  if (alpha === 1) {
    const r = Math.round(color.r * 255);
    const g = Math.round(color.g * 255);
    const b = Math.round(color.b * 255);

    const toHex = (num: number): string => num.toString(16).padStart(2, "0");
    return `#${toHex(r)}${toHex(g)}${toHex(b)}`.toUpperCase();
  }

  // Use rgba for transparent colors
  const r = numberToFixedString(color.r * 255);
  const g = numberToFixedString(color.g * 255);
  const b = numberToFixedString(color.b * 255);
  const a = numberToFixedString(alpha);

  return `rgba(${r}, ${g}, ${b}, ${a})`;
};

// ---- Gradient Transformation ----
export const gradientAngle = (fill: GradientPaint): number => {