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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
import { colorLib } from "./deps.ts";
/** A set of CSS RGB colors which can be used with charts. */export enum ChartColors {  Red = "rgb(255, 99, 132)",  Orange = "rgb(255, 159, 64)",  Yellow = "rgb(255, 205, 86)",  Green = "rgb(75, 192, 192)",  Blue = "rgb(54, 162, 235)",  Purple = "rgb(153, 102, 255)",  Grey = "rgb(201, 203, 207)",}
/** A utility function which takes a CSS string color value and applies the * percentage of opacity to it and returns a new CSS string color value. * * If the opacity is not provided, it defaults to 50%. */export function transparentize(value: string, opacity?: number) {  const alpha = opacity === undefined ? 0.5 : 1 - opacity;  return colorLib(value).alpha(alpha).rgbString();}