JSFiddle - React, Tailwind, and code Playground
JavaScript
var color = "RGBA(205,31,31,1)";
var regExp = /\(([^)]+)\)/;
var matches = regExp.exec(color);
var splits = matches[1].split(',');
alert("red: " + splits[0] + "green: " + splits[1]+ "blue: "+ splits[2]+ "alpha: " +splits[3] );