diff --git a/src/js/tabs/pid_tuning.js b/src/js/tabs/pid_tuning.js
index 66221e50..fa475fa5 100644
--- a/src/js/tabs/pid_tuning.js
+++ b/src/js/tabs/pid_tuning.js
@@ -1,4 +1,5 @@
 import { i18n } from "../localization";
+import { colorTables, getColorForPercentage } from '../utils/css.js';
 
 const pid_tuning = {
     RATE_PROFILE_MASK: 128,
@@ -2962,7 +2963,7 @@ pid_tuning.updatePIDColors = function(clear = false) {
         }
 
         const change = (currentValue - mspValue) / 50;
-        element.css({ "background-color": cssUtil.getColorForPercentage(change, cssUtil.colorTables.pidSlider) });
+        element.css({ "background-color": getColorForPercentage(change, colorTables.pidSlider) });
     };
 
     FC.PID_NAMES.forEach(function(elementPid, indexPid) {
diff --git a/src/js/utils/css.js b/src/js/utils/css.js
index 5540fde1..86fed303 100644
--- a/src/js/utils/css.js
+++ b/src/js/utils/css.js
@@ -1,12 +1,8 @@
-'use strict';
-
 /*
   This utility contains CSS helpers.
 */
 
-const CSSUtil = function () {};
-
-CSSUtil.prototype.colorTables = {
+export const colorTables = {
   redWhiteGreen: [
     { percentage: -1, color: { r: 0xff, g: 0x00, b: 0x00, a: 1.0 } },
     { percentage: 0, color: { r: 0xff, g: 0xff, b: 0xff, a: 1.0 } },
@@ -20,19 +16,19 @@ CSSUtil.prototype.colorTables = {
 };
 
 // Stack Overflow: https://stackoverflow.com/a/7128796/4107016
-CSSUtil.prototype.getColorForPercentage = function(percentage, colorTable = null) {
-    colorTable = colorTable || cssUtil.colorTables.redWhiteGreen;
+export function getColorForPercentage(percentage, colorTableOverride = null) {
+    colorTableOverride = colorTableOverride || colorTables.redWhiteGreen;
 
     percentage = Math.min(1, Math.max(-1, percentage));
 
     let index;
-    for (index = 1; index < colorTable.length - 1; index++) {
-        if (percentage < colorTable[index].percentage) {
+    for (index = 1; index < colorTableOverride.length - 1; index++) {
+        if (percentage < colorTableOverride[index].percentage) {
             break;
         }
     }
-    const lower = colorTable[index - 1];
-    const upper = colorTable[index];
+    const lower = colorTableOverride[index - 1];
+    const upper = colorTableOverride[index];
     const range = upper.percentage - lower.percentage;
     const rangePercentage = (percentage - lower.percentage) / range;
     const percentageLower = 1 - rangePercentage;
@@ -45,7 +41,3 @@ CSSUtil.prototype.getColorForPercentage = function(percentage, colorTable = null
     };
     return `rgba(${[color.r, color.g, color.b, color.a].join(",")})`;
 };
-
-const cssUtil = new CSSUtil();
-window.cssUtil = cssUtil;
-export default cssUtil;
diff --git a/src/main.html b/src/main.html
index 1d19e1fc..ec43cd6d 100644
--- a/src/main.html
+++ b/src/main.html
@@ -78,8 +78,6 @@
     <script type="text/javascript" src="./js/libraries/jquery.ba-throttle-debounce.min.js"></script>
     <script type="text/javascript" src="./node_modules/inflection/inflection.min.js"></script>
     <script type="text/javascript" src="./js/libraries/analytics.js"></script>
-    <!-- TODO: remove when using modules fully -->
-    <script type="module" src="./js/utils/css.js"></script>
     <script type="text/javascript" src="./js/utils/window_watchers.js"></script>
     <script type="text/javascript" src="./js/utils/VtxDeviceStatus/VtxDeviceStatusFactory.js"></script>
     <script type="text/javascript" src="./js/utils/VtxDeviceStatus/VtxDeviceStatus.js"></script>