diff --git a/assets/scripts/customizer-a11y.js b/assets/scripts/customizer-a11y.js
deleted file mode 100644
index f5b3feb..0000000
--- a/assets/scripts/customizer-a11y.js
+++ /dev/null
@@ -1,55 +0,0 @@
-const { __ } = wp.i18n
-
-document.addEventListener( 'DOMContentLoaded', function () {
-
-	function addAttribute( selector, att, val ){
-		let e = document.querySelectorAll( selector );
-		for ( let i=0; i < e.length; i++ ) {
-			e[ i ].setAttribute( att, val );
-		}
-	}
-
-	// Add aria-label attribute to color picker slider
-	// https://github.com/Automattic/Iris/issues/69
-	addAttribute( 'div.iris-slider.iris-strip', 'aria-label', __( 'Gradient selector', 'pressbooks' ) );
-	addAttribute( '.ui-slider-handle', 'aria-label', __( 'Gradient selector', 'pressbooks' ) );
-
-	// Add aria-label attributes to color picker palette boxes
-	// https://github.com/Automattic/Iris/issues/69
-	 ( function (){
-		let colors = document.querySelectorAll( 'a.iris-palette' );
-
-		for ( let i=0; i < colors.length; i++ ) {
-			let irisPalette = colors[ i ];
-			let rgb = colors[ i ].style.backgroundColor;
-			let color = '';
-
-			if ( rgb === 'rgb(0, 0, 0)' ){
-				color = __( 'Black', 'pressbooks' )
-			}
-			if ( rgb === 'rgb(255, 255, 255)' ){
-				color = __( 'White', 'pressbooks' )
-			}
-			if ( rgb === 'rgb(221, 51, 51)' ){
-				color = __( 'Red', 'pressbooks' )
-			}
-			if ( rgb === 'rgb(221, 153, 51)' ){
-				color = __( 'Orange', 'pressbooks' )
-			}
-			if ( rgb === 'rgb(238, 238, 34)' ){
-				color = __( 'Yellow', 'pressbooks' )
-			}
-			if ( rgb === 'rgb(129, 215, 66)' ){
-				color = __( 'Green', 'pressbooks' )
-			}
-			if ( rgb === 'rgb(30, 115, 190)' ){
-				color = __( 'Blue', 'pressbooks' )
-			}
-			if ( rgb === 'rgb(130, 36, 227)' ){
-				color = __( 'Purple', 'pressbooks' )
-			}
-
-			irisPalette.setAttribute( 'aria-label', __( 'Select ' + color, 'pressbooks' ) );
-		}
-	} )();
-} );
diff --git a/inc/customizer/namespace.php b/inc/customizer/namespace.php
index c689e14..ed79a7b 100644
--- a/inc/customizer/namespace.php
+++ b/inc/customizer/namespace.php
@@ -296,6 +296,5 @@ function enqueue_customizer_scripts() {
 	$assets = new Assets( 'pressbooks-aldine', 'theme' );
 	$assets->setSrcDirectory( 'assets' )->setDistDirectory( 'dist' );
 
-	wp_enqueue_script( 'aldine/customizer-a11y', $assets->getPath( 'scripts/customizer-a11y.js' ), [ 'wp.i18n' ], false, null );
 	wp_enqueue_script( 'aldine/customizer-toggle', $assets->getPath( 'scripts/customizer-toggle.js' ), false, null );
 }
diff --git a/package-lock.json b/package-lock.json
index e993b45..a141d60 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6824,13 +6824,11 @@
 				},
 				"balanced-match": {
 					"version": "1.0.0",
-					"bundled": true,
-					"optional": true
+					"bundled": true
 				},
 				"brace-expansion": {
 					"version": "1.1.11",
 					"bundled": true,
-					"optional": true,
 					"requires": {
 						"balanced-match": "^1.0.0",
 						"concat-map": "0.0.1"
@@ -6843,18 +6841,15 @@
 				},
 				"code-point-at": {
 					"version": "1.1.0",
-					"bundled": true,
-					"optional": true
+					"bundled": true
 				},
 				"concat-map": {
 					"version": "0.0.1",
-					"bundled": true,
-					"optional": true
+					"bundled": true
 				},
 				"console-control-strings": {
 					"version": "1.1.0",
-					"bundled": true,
-					"optional": true
+					"bundled": true
 				},
 				"core-util-is": {
 					"version": "1.0.2",
@@ -6957,8 +6952,7 @@
 				},
 				"inherits": {
 					"version": "2.0.3",
-					"bundled": true,
-					"optional": true
+					"bundled": true
 				},
 				"ini": {
 					"version": "1.3.5",
@@ -6968,7 +6962,6 @@
 				"is-fullwidth-code-point": {
 					"version": "1.0.0",
 					"bundled": true,
-					"optional": true,
 					"requires": {
 						"number-is-nan": "^1.0.0"
 					}
@@ -6981,20 +6974,17 @@
 				"minimatch": {
 					"version": "3.0.4",
 					"bundled": true,
-					"optional": true,
 					"requires": {
 						"brace-expansion": "^1.1.7"
 					}
 				},
 				"minimist": {
 					"version": "0.0.8",
-					"bundled": true,
-					"optional": true
+					"bundled": true
 				},
 				"minipass": {
 					"version": "2.3.5",
 					"bundled": true,
-					"optional": true,
 					"requires": {
 						"safe-buffer": "^5.1.2",
 						"yallist": "^3.0.0"
@@ -7011,7 +7001,6 @@
 				"mkdirp": {
 					"version": "0.5.1",
 					"bundled": true,
-					"optional": true,
 					"requires": {
 						"minimist": "0.0.8"
 					}
@@ -7084,8 +7073,7 @@
 				},
 				"number-is-nan": {
 					"version": "1.0.1",
-					"bundled": true,
-					"optional": true
+					"bundled": true
 				},
 				"object-assign": {
 					"version": "4.1.1",
@@ -7095,7 +7083,6 @@
 				"once": {
 					"version": "1.4.0",
 					"bundled": true,
-					"optional": true,
 					"requires": {
 						"wrappy": "1"
 					}
@@ -7201,7 +7188,6 @@
 				"string-width": {
 					"version": "1.0.2",
 					"bundled": true,
-					"optional": true,
 					"requires": {
 						"code-point-at": "^1.0.0",
 						"is-fullwidth-code-point": "^1.0.0",
diff --git a/webpack.mix.js b/webpack.mix.js
index 9ca5937..018a669 100644
--- a/webpack.mix.js
+++ b/webpack.mix.js
@@ -45,7 +45,6 @@ mix
 	.js( `${assets}/scripts/call-to-action.js`, `${dist}/scripts` )
 	.js( `${assets}/scripts/catalog-admin.js`, `${dist}/scripts` )
 	.js( `${assets}/scripts/customizer.js`, `${dist}/scripts` )
-	.js( `${assets}/scripts/customizer-a11y.js`, `${dist}/scripts` )
 	.js( `${assets}/scripts/customizer-toggle.js`, `${dist}/scripts` )
 	.js( `${assets}/scripts/page-section.js`, `${dist}/scripts` );