diff --git a/docs/reference-guides/core-blocks.md b/docs/reference-guides/core-blocks.md
index 4d69b16d5713e..eb20480f9c1a5 100644
--- a/docs/reference-guides/core-blocks.md
+++ b/docs/reference-guides/core-blocks.md
@@ -707,7 +707,7 @@ Create a break between ideas or sections with a horizontal separator. ([Source](
 
 -	**Name:** core/separator
 -	**Category:** design
--	**Supports:** align (center, full, wide), anchor, color (background, gradients, ~~text~~), spacing (margin)
+-	**Supports:** align (center, full, wide), anchor, color (background, gradients, ~~enableContrastChecker~~, ~~text~~), spacing (margin)
 -	**Attributes:** opacity
 
 ## Shortcode
diff --git a/packages/block-editor/src/hooks/color.js b/packages/block-editor/src/hooks/color.js
index d6534627c93c3..ad6a14028d3f2 100644
--- a/packages/block-editor/src/hooks/color.js
+++ b/packages/block-editor/src/hooks/color.js
@@ -450,14 +450,24 @@ export function ColorEdit( props ) {
 		};
 	};
 
-	const enableContrastChecking =
-		Platform.OS === 'web' && ! gradient && ! style?.color?.gradient;
-
 	const defaultColorControls = getBlockSupport( props.name, [
 		COLOR_SUPPORT_KEY,
 		'__experimentalDefaultControls',
 	] );
 
+	const enableContrastChecking =
+		Platform.OS === 'web' &&
+		! gradient &&
+		! style?.color?.gradient &&
+		// Contrast checking is enabled by default.
+		// Deactivating it requires `enableContrastChecker` to have
+		// an explicit value of `false`.
+		false !==
+			getBlockSupport( props.name, [
+				COLOR_SUPPORT_KEY,
+				'enableContrastChecker',
+			] );
+
 	return (
 		<ColorPanel
 			enableContrastChecking={ enableContrastChecking }
diff --git a/packages/block-library/src/separator/block.json b/packages/block-library/src/separator/block.json
index ea37e4ea41065..bee358d208516 100644
--- a/packages/block-library/src/separator/block.json
+++ b/packages/block-library/src/separator/block.json
@@ -17,6 +17,7 @@
 		"anchor": true,
 		"align": [ "center", "wide", "full" ],
 		"color": {
+			"enableContrastChecker": false,
 			"__experimentalSkipSerialization": true,
 			"gradients": true,
 			"background": true,
diff --git a/schemas/json/block.json b/schemas/json/block.json
index fd7bd5a06f708..4a343c51f4fb4 100644
--- a/schemas/json/block.json
+++ b/schemas/json/block.json
@@ -278,6 +278,11 @@
 							"type": "boolean",
 							"description": "This property adds block controls which allow the user to set text color in a block.\n\nWhen color support is declared, this property is enabled by default (along with background), so simply setting color will enable text color.\n\nText color presets are sourced from the editor-color-palette theme support.\n\nWhen the block declares support for color.text, the attributes definition is extended to include two new attributes: textColor and style",
 							"default": true
+						},
+						"enableContrastChecker": {
+							"type": "boolean",
+							"description": "Determines whether the contrast checker widget displays in the block editor UI.\n\nThe contrast checker appears only if the block declares support for color. It tests the readability of color combinations and warns if there is a potential issue. The property is enabled by default.\n\nSet to `false` to explicitly disable.",
+							"default": true
 						}
 					}
 				},