Further style tweaks.

Author: johnpinto1

src/themes/datashare/styles/_theme_sass_variable_overrides.scss

@@ -70,11 +70,12 @@ $link-hover-color: #002b3e !default;
 
 $theme-colors: (
   primary: $blue-muted,
-  secondary: #f9f9f9,
+  secondary: #495057,
   success: #5cb85c,
   info: #5bc0de,
   warning: #f0ad4e,
   danger: #d9534f,
   light: #ffffff,
   dark: #3a3a3a
 ) !default;
+