_attributes['style']['color']['text'] : null;
		$color_block_styles['text'] = $preset_text_color ? $preset_text_color : $custom_text_color;
	}

	// Background colors.
	if ( $has_background_colors_support && ! wp_should_skip_block_supports_serialization( $block_type, 'color', 'background' ) ) {
		$preset_background_color          = array_key_exists( 'backgroundColor', $block_attributes ) ? "var:preset|color|{$block_attributes['backgroundColor']}" : null;
		$custom_background_color          = isset( $block_attributes['style']['color']['background'] ) ? $block_attributes['style']['color']['background'] : null;
		$color_block_styles['background'] = $preset_background_color ? $preset_background_color : $custom_background_color;
	}

	// Gradients.
	if ( $has_gradients_support && ! wp_should_skip_block_supports_serialization( $block_type, 'color', 'gradients' ) ) {
		$preset_gradient_color          = array_key_exists( 'gradient', $block_attributes ) ? "var:preset|gradient|{$block_attributes['gradient']}" : null;
		$custom_gradient_color          = isset( $block_attributes['style']['color']['gradient'] ) ? $block_attributes['style']['color']['gradient'] : null;
		$color_block_styles['gradient'] = $preset_gradient_color ? $preset_gradient_color : $custom_gradient_color;
	}

	$attributes = array();
	$styles     = wp_style_engine_get_styles( array( 'color' => $color_block_styles ), array( 'convert_vars_to_classnames' => true ) );

	if ( ! empty( $styles['classnames'] ) ) {
		$attributes['class'] = $styles['classnames'];
	}

	if ( ! empty( $styles['css'] ) ) {
		$attributes['style'] = $styles['css'];
	}

	return $attributes;
}

// Register the block support.
WP_Block_Supports::get_instance()->register(
	'colors',
	array(
		'register_attribute' => 'wp_register_colors_support',
		'apply'              => 'wp_apply_colors_support',
	)
);