Darken a bit the website colors (devicons#1669)

This fixes the issue of the invisible Devicon logo.
It could be fixed by changing the background color manually, but I think we should have it fixed by default.

Co-authored-by: Jørgen Kalsnes Hagen <43886029+Snailedlt@users.noreply.github.com>

docs/assets/css/style.css

@@ -4,9 +4,9 @@
 @import url(https://fonts.googleapis.com/css?family=Damion);
 :root {
   /* color */
-  --primaryColor: #60be86;
+  --primaryColor: #3D9561;
   --primaryColorDark: #2D804E;
-  --primaryColorLight: #65d693;
+  --primaryColorLight: #4AB475;
   --grey: #4c6857;
 
   /* sizing */

docs/assets/js/script.js

@@ -40,7 +40,7 @@ devicon.controller('IconListCtrl', function($scope, $http, $compile) {
 
     // background color related stuff
     // default is the default site background color
-    $scope.DEFAULT_BACKGROUND = "#60be86";
+    $scope.DEFAULT_BACKGROUND = "#3D9561";
     $scope.fontBackground = $scope.DEFAULT_BACKGROUND;
     $scope.svgBackground = $scope.DEFAULT_BACKGROUND;