react-native-easy-calendar/src/Utils/addOpacity.ts

Customizable, easy-to-use, performant calendar components for React Native

import clamp from './clamp';

const addOpacity = (color: string, opacity: number): string => {
  const normalizedOpacity = clamp(opacity, 0, 1);

  const alpha = Math.round(255 * normalizedOpacity)
    .toString(16)
    .toUpperCase();

  const normalizedAlpha = alpha.padStart(2, '0');

  return `${color}${normalizedAlpha}`;
};

export default addOpacity;