WP_Customize_Manager::_sanitize_header_textcolor( string $color )

Source

File: wp-includes/class-wp-customize-manager.php

public function _sanitize_header_textcolor( $color ) {
		if ( 'blank' === $color ) {
			return 'blank';
		}

		$color = sanitize_hex_color_no_hash( $color );
		if ( empty( $color ) ) {
			$color = get_theme_support( 'custom-header', 'default-text-color' );
		}

		return $color;
	}