diff --git a/frontend/less/violet/variables.less b/frontend/less/violet/variables.less
index a2614a84ab..ed3bba7896 100644
--- a/frontend/less/violet/variables.less
+++ b/frontend/less/violet/variables.less
@@ -32,6 +32,12 @@
 @btn-default-bg-value: #c0c6db;
 @btn-default-border-value: @btn-default-bg-value;
 @btn-default-color-value: #525252;
+@btn-default-hover-border-value: darken(@btn-default-bg-value, 4%);
+@btn-default-active-bg-value: darken(@btn-default-bg-value, 10%);
+@btn-default-active-border-value: darken(@btn-default-bg-value, 15%);
+
+@btn-primary-active-bg-value: darken(@btn-primary-bg-value, 15%);
+@btn-primary-active-border-value: darken(@btn-primary-bg-value, 18%);
 
 @border-radius-value: 6px;
 @panel-border-radius-value: 10px;