Twenty Seventeen: Allow child themes to easily extend custom color patterns

By adding a filter, child themes can add additional selectors onto the custom color scheme CSS. Like so:

{{{
// Add child theme selectors for color schemes.
function dynamic_seventeen_custom_colors_css( $css, $hue, $saturation ) {
	$css .= '
	.colors-custom .content-menu > article:not(.has-post-thumbnail),
	.colors-custom .content-menu > section:not(.has-post-thumbnail) {
		border-top-color: hsl( ' . $hue . ', ' . $saturation . ', 87% ); /* base: #ddd; */
	}';
	return $css;
}
add_filter( 'twentyseventeen_custom_colors_css', 'dynamic_seventeen_custom_colors_css', 10, 3 );
}}}

Merge of [39386] to the 4.7 branch.

Props celloexpressions.
See #38949.
Built from https://develop.svn.wordpress.org/branches/4.7@39387


git-svn-id: http://core.svn.wordpress.org/branches/4.7@39327 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-content/themes/twentyseventeen/inc/color-patterns.php

@@ -557,5 +557,15 @@ body.colors-custom,
 	}
 }';
 
-	return $css;
+
+	/**
+	 * Filters Twenty Seventeen custom colors CSS.
+	 *
+	 * @since Twenty Seventeen 1.0
+	 *
+	 * @param $css        string Base theme colors CSS.
+	 * @param $hue        int    The user's selected color hue.
+	 * @param $saturation string Filtered theme color saturation level.
+	 */
+	return apply_filters( 'twentyseventeen_custom_colors_css', $css, $hue, $saturation );
 }

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-RC1-39385';
+$wp_version = '4.7-RC1-39387';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.