[rbdr/tomato-sauce] / lib / renderers / 256_colors.js

'use strict';

/**
 * Returns a 256 color, see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
 * for more info.
 *
 * @function 256ColorsRenderer
 * @implements IRenderer
 */
module.exports = function (red, blue, green) {

  const redValue = Math.round(red * 5 / 255);
  const blueValue = Math.round(blue * 5 / 255);
  const greenValue = Math.round(green * 5 / 255);

  const colorNumber = 16 + 36 * redValue + 6 * greenValue + blueValue;

  return `\x1B[48;5;${colorNumber}m`;
};