Adjust contrast of menu

Author: bradfrost

packages/docs/src/scss/components/_header.scss

@@ -8,7 +8,7 @@
 .c-header {
 	position: relative;
 	background: $color-gray-88;
-	color: $color-gray-50;
+	color: $color-gray-27;
 	padding: $spacing;
 	@include hideScrollbar();