Function changeColorAlpha

packages/theme/src/theme-engine/utils.ts:178–190

(color: string, opacity: number)

}

function changeColorAlpha(color: string, opacity: number) {
  //if it has an alpha, remove it
  if (color.length > 7) color = color.substring(0, color.length - 2);

  // coerce values so ti is between 0 and 1.
  const _opacity = Math.round(Math.min(Math.max(opacity, 0), 1) * 255);
  let opacityHex = _opacity.toString(16).toUpperCase();

  // opacities near 0 need a trailing 0
  if (opacityHex.length == 1) opacityHex = "0" + opacityHex;

  return color + opacityHex;
}