diff --git a/docs/.vuepress/styles/index.styl b/docs/.vuepress/styles/index.styl
index 7c5082cf9..bac012518 100644
--- a/docs/.vuepress/styles/index.styl
+++ b/docs/.vuepress/styles/index.styl
@@ -1,3 +1,7 @@
+html {
+  filter: grayscale(100%);
+}
+
 .home .hero img
   max-width: 500px !important
   min-width: 300px