modified antarctic button

src/client/styles/scss/theme/antarctic.scss

@@ -115,7 +115,7 @@ html[dark] {
   //Button
   .grw-three-stranded-button {
     .btn.btn-outline-primary {
-      @include three-stranded-button(darken($primary, 30%), lighten($primary, 65%), lighten($primary, 70%));
+      @include three-stranded-button(darken($primary, 10%), lighten($primary, 55%), lighten($primary, 60%));
     }
   }