diff --git a/index.js b/index.js
index 5746537..30e3ba8 100644
--- a/index.js
+++ b/index.js
@@ -129,12 +129,12 @@ function assembleStyles() {
 		},
 		hexToRgb: {
 			value: hex => {
-				const matches = /(?<colorString>[a-f\d]{6}|[a-f\d]{3})/i.exec(hex.toString(16));
+				const matches = /[a-f\d]{6}|[a-f\d]{3}/i.exec(hex.toString(16));
 				if (!matches) {
 					return [0, 0, 0];
 				}
 
-				let {colorString} = matches.groups;
+				let [colorString] = matches;
 
 				if (colorString.length === 3) {
 					colorString = [...colorString].map(character => character + character).join('');