diff --git a/web/public/style.css b/web/public/style.css
index 83037ce..d23dc0d 100644
--- a/web/public/style.css
+++ b/web/public/style.css
@@ -33,6 +33,15 @@
   font-style: normal;
   font-display: swap;
 }
+
+:root {
+  --col-11: #fff;
+  --col-10: #eee;
+  --col-06: #999;
+  --col-05: #808080;
+  --col-04: #777;
+  --col-01: #111;
+  --col-00: #000;
 }
 * {
   display: block;