Update common.scss

Update common.scss

diff --git a/common/common.scss b/common/common.scss
index 9aa7cea..c236cca 100644
--- a/common/common.scss
+++ b/common/common.scss
@@ -1,5 +1,5 @@
 div.totp-code {
-  background-color: $highlight-low;
+  background-color: var(primary-low);
   padding: 10px;
   width: 100px;
   text-align: center;

GitHub sha: fb7a9d6d3738ec2fac356464fdc5259f8ffd1109

highlight makes this hard to read on certain color schemes, primary-low seems to work well all around.

feel free to revert if this doesnt work