Function toCssColor

apps/sim/lib/colors/convert.ts:95–100

(color: string, alpha: number)

 * fully opaque, otherwise `rgba(r,g,b,a)`. Accepts hex with or without `#`.
 */
export function toCssColor(color: string, alpha: number): string {
  const hex = color.startsWith('#') ? color : `#${color}`
  if (alpha >= 1) return hex
  const { r, g, b } = hexToRgb(hex)
  return `rgba(${r},${g},${b},${alpha.toFixed(3)})`
}