added variable to stanford sass vars file

static/sass/_stanford.scss

@@ -32,6 +32,7 @@ $gray-75: lighten($gray, 18.25%); //Lighter Text Color
 $gray-3: #e9e6df; //Block/Course BG Color
 $gray-2: #f2f1eb;
 $gray-1: #fbfbf9; //Main BG Color
+$white: $gray-1;
 
 $black: #2e2d29;
 $black-80: #585754;