From 8a37398eeca0fa61c01322722a25a1464ec53d94 Mon Sep 17 00:00:00 2001
From: Sukhendu Sekhar Guria <sukhendu.guria@rtcamp.com>
Date: Tue, 5 May 2026 12:11:45 +0530
Subject: [PATCH 1/2] Remove hardcoded button colors from core theme.json

---
 src/wp-includes/theme.json                    |  4 ---
 .../tests/theme/wpThemeJsonResolver.php       | 28 +++++++++++++++++++
 2 files changed, 28 insertions(+), 4 deletions(-)

diff --git a/src/wp-includes/theme.json b/src/wp-includes/theme.json
index fb26d36518841..15ae6d9434717 100644
--- a/src/wp-includes/theme.json
+++ b/src/wp-includes/theme.json
@@ -380,10 +380,6 @@
 		},
 		"elements": {
 			"button": {
-				"color": {
-					"text": "#fff",
-					"background": "#32373c"
-				},
 				"spacing": {
 					"padding": {
 						"top": "calc(0.667em + 2px)",
diff --git a/tests/phpunit/tests/theme/wpThemeJsonResolver.php b/tests/phpunit/tests/theme/wpThemeJsonResolver.php
index ce5609a396f18..58ecce9caeb94 100644
--- a/tests/phpunit/tests/theme/wpThemeJsonResolver.php
+++ b/tests/phpunit/tests/theme/wpThemeJsonResolver.php
@@ -1484,4 +1484,32 @@ public function test_block_style_variation_merge_order() {
 
 		$this->assertSameSetsWithIndex( $expected, $actual, 'Merged variation styles do not match.' );
 	}
+
+	/**
+	 * Tests that core theme.json does not emit hardcoded button color declarations
+	 * that would override theme styles due to CSS load order.
+	 *
+	 * @covers WP_Theme_JSON_Resolver::get_core_data
+	 * @ticket 65162
+	 */
+	public function test_core_theme_json_does_not_set_button_colors() {
+		$stylesheet = WP_Theme_JSON_Resolver::get_core_data()->get_stylesheet( array( 'styles' ) );
+
+		preg_match( '/:root :where\(\.wp-element-button[^{]*\)\s*\{[^}]*\}/', $stylesheet, $matches );
+		$this->assertNotEmpty( $matches, 'Button element rule should exist in core stylesheet.' );
+
+		$button_rule = $matches[0];
+
+		$this->assertStringNotContainsString(
+			'background-color',
+			$button_rule,
+			'Core theme.json must not set a background-color on the button element.'
+		);
+
+		$this->assertStringNotContainsString(
+			'color:',
+			$button_rule,
+			'Core theme.json must not set any color property on the button element.'
+		);
+	}
 }

From 82faafc59b8e968cc7ac588fe24ce0545338f041 Mon Sep 17 00:00:00 2001
From: "wordpress-develop-pr-bot[bot]"
 <1178653+wordpress-develop-pr-bot[bot]@users.noreply.github.com>
Date: Tue, 5 May 2026 06:46:05 +0000
Subject: [PATCH 2/2] Automation: Updating built files with changes.

---
 src/wp-includes/theme.json | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/wp-includes/theme.json b/src/wp-includes/theme.json
index 15ae6d9434717..fb26d36518841 100644
--- a/src/wp-includes/theme.json
+++ b/src/wp-includes/theme.json
@@ -380,6 +380,10 @@
 		},
 		"elements": {
 			"button": {
+				"color": {
+					"text": "#fff",
+					"background": "#32373c"
+				},
 				"spacing": {
 					"padding": {
 						"top": "calc(0.667em + 2px)",