Change the green theme color

admin/static/css/mixin.styl

@@ -1,7 +1,7 @@
 $defaultColor   = #8FB1DD
 $aquaColor      = #91D6DF
 $blueColor      = #BAD0EF
-$greenColor     = #B5E6A8
+$greenColor     = #9BDD89
 $tealColor      = #97BEAD
 $purpleColor    = #B6B4EB
 $brownColor     = #DABB9E
@@ -31,7 +31,7 @@ $color20        = #9EC4DA
 $color21        = #B6B4EB
 $color22        = #DD9DAC
 $color23        = #BAA8E6
-$color24        = #B5E6A8
+$color24        = #9BDD89
 $color25        = #E6D4A8
 $color26        = #E6CBA8
 $color27        = #E6B7A8