JavaScript RGB Color Gradient Parser

Gradient-Parser.js

const colorParserInt = rgb => {
  const [_, r, g, b] = rgb.toUpperCase().match(/([A-Fa-f0-9]{2})([A-Fa-f0-9]{2})([A-Fa-f0-9]{2})/);
  return {
    r: parseInt(`0x${r}`),
    g: parseInt(`0x${g}`),
    b: parseInt(`0x${b}`)
  };
}

const colorParserHex = (r, g, b) => {
  return `${r.toString(16)}${g.toString(16)}${b.toString(16)}`.toUpperCase();
}


const gradientConverter = (startColor, endColor, calcPoint) => {
  const start = colorParserInt(startColor);
  const end = colorParserInt(endColor);
  
  return calcColor = colorParserHex(
    Math.floor(start.r * calcPoint + end.r * (1 - calcPoint)),
    Math.floor(start.g * calcPoint + end.g * (1 - calcPoint)),
    Math.floor(start.b * calcPoint + end.b * (1 - calcPoint))
  );
}

Usage example:

gradientConverter("6E0CAD", "202124", 0.3);
// '371A4D'