diff --git a/css/brands-extended.css b/css/brands-extended.css
index b6b779c..caed508 100644
--- a/css/brands-extended.css
+++ b/css/brands-extended.css
@@ -349,15 +349,16 @@
 
 /* SimpleX Chat */
 .button-simplex {
-	--button-text:#000000;
-	--button-background:#F3F6F7;
+  --button-text:#000000;
+  --button-background:#F3F6F7;
+  --button-border: 1px solid #000000;
 }
 
 /* SimpleX Chat Alt */
 .button-simplex-alt {
-	--button-text:#FFFFFF;
-	--background-color: #000000;
-	--button-border: 1px solid #000000;
+  --button-text:#FFFFFF;
+  --background-color: #000000;
+  --button-border: 1px solid #FFFFFF;
 }
 
 /* Skoob */