used button outline variant

src/client/styles/scss/theme/spring.scss

@@ -96,8 +96,7 @@ html[dark] {
   //Button
   // Outline buttons are applyed the accent color to this spring theme cuz the primary is too light and it looks like unable to click them.
   .btn.btn-outline-primary {
-    color: $accentcolor;
-    border-color: $accentcolor;
+    @include button-outline-variant($accentcolor, $accentcolor, lighten($accentcolor, 20%), $accentcolor);
   }
   .btn-group.grw-three-stranded-button {
     .btn.btn-outline-primary {