toRGBArray

Converts an rgb() color string to an array of values.

• Use String.prototype.match() to get an array of 3 string with the numeric values.
• Use Array.prototype.map() in combination with Number to convert them into an array of numeric values.

const toRGBArray = rgbStr => rgbStr.match(/\d+/g).map(Number);

toRGBArray('rgb(255, 12, 0)'); // [255, 12, 0]