diff --git a/docs/.vuepress/components/Contribution.vue b/docs/.vuepress/components/Contribution.vue
index 477356a1522a6866aaeb5d720f5a19242183dda4..411a8bdf7a05361d66693b497bf3c679e3d05568 100644
--- a/docs/.vuepress/components/Contribution.vue
+++ b/docs/.vuepress/components/Contribution.vue
@@ -171,6 +171,7 @@ export default {
 }
 
 .card {
+  background-color: #e3f2fd;
   border: 1px solid #ccc;
   border-radius: 5px;
   margin-bottom: 10px;