diff --git a/userChrome.css b/userChrome.css
index 00789a7..82362db 100644
--- a/userChrome.css
+++ b/userChrome.css
@@ -214,7 +214,7 @@ menupopup menu[_moz-menuactive=true] {
 }
 vbox#sidebar-box.chromeclass-extrachrome {
   border-color: var(--in-content-category-header-background)!important;
-  border-right: 1px!important;
+  border-right: 1px var(--in-content-category-header-background) !important;
   border-style: solid!important
 }
 #_testpilot-containers_7 .menu-iconic-left,
diff --git a/userContent.css b/userContent.css
index ea1bf8f..bf577ee 100644
--- a/userContent.css
+++ b/userContent.css
@@ -214,7 +214,7 @@ menupopup menu[_moz-menuactive=true] {
 }
 vbox#sidebar-box.chromeclass-extrachrome {
   border-color: var(--in-content-category-header-background)!important;
-  border-right: 1px!important;
+  border-right: 1px var(--in-content-category-header-background) !important;
   border-style: solid!important
 }
 #_testpilot-containers_7 .menu-iconic-left,