diff --git a/themes/helveticus/webapp/helveticus/helveticus-amber.less b/themes/helveticus/webapp/helveticus/helveticus-amber.less
index b2640b5..c65316e 100644
--- a/themes/helveticus/webapp/helveticus/helveticus-amber.less
+++ b/themes/helveticus/webapp/helveticus/helveticus-amber.less
@@ -24,9 +24,9 @@
 
 @header-color: @yellow;
 @footer-color: @yellow;
-@light-color-theme : @yellow-light;
-@main-color-theme : @yellow;
-@dark-color-theme : @yellow-dark;
+@light-color-theme: @yellow-light;
+@main-color-theme: @yellow;
+@dark-color-theme: @yellow-dark;
 
 /* include main less theme file */
 @import (less) "helveticus-main-theme.less";
diff --git a/themes/helveticus/webapp/helveticus/helveticus-emerald.less b/themes/helveticus/webapp/helveticus/helveticus-emerald.less
index 121da12..9ca07db 100644
--- a/themes/helveticus/webapp/helveticus/helveticus-emerald.less
+++ b/themes/helveticus/webapp/helveticus/helveticus-emerald.less
@@ -24,9 +24,9 @@
 
 @header-color: @green;
 @footer-color: @green;
-@light-color-theme : @green-light;
-@main-color-theme : @green;
-@dark-color-theme : @green-dark;
+@light-color-theme: @green-light;
+@main-color-theme: @green;
+@dark-color-theme: @green-dark;
 
 /* include main less theme file */
 @import (less) "helveticus-main-theme.less";
diff --git a/themes/helveticus/webapp/helveticus/helveticus-ruby.less b/themes/helveticus/webapp/helveticus/helveticus-ruby.less
index 1210851..9429508 100644
--- a/themes/helveticus/webapp/helveticus/helveticus-ruby.less
+++ b/themes/helveticus/webapp/helveticus/helveticus-ruby.less
@@ -24,9 +24,9 @@
 
 @header-color: @red;
 @footer-color: @red;
-@light-color-theme : @red-light;
-@main-color-theme : @red;
-@dark-color-theme : @red-dark;
+@light-color-theme: @red-light;
+@main-color-theme: @red;
+@dark-color-theme: @red-dark;
 
 /* include main less theme file */
 @import (less) "helveticus-main-theme.less";
diff --git a/themes/helveticus/webapp/helveticus/helveticus-saphir.less b/themes/helveticus/webapp/helveticus/helveticus-saphir.less
index e3c329c..e607a2d 100644
--- a/themes/helveticus/webapp/helveticus/helveticus-saphir.less
+++ b/themes/helveticus/webapp/helveticus/helveticus-saphir.less
@@ -24,9 +24,9 @@
 
 @header-color: @blue;
 @footer-color: @blue;
-@light-color-theme : @blue-light;
-@main-color-theme : @blue;
-@dark-color-theme : @blue-dark;
+@light-color-theme: @blue-light;
+@main-color-theme: @blue;
+@dark-color-theme: @blue-dark;
 
 /* include main less theme file */
 @import (less) "helveticus-main-theme.less";