diff --git a/default_environment/stylesheet/language_nix.css b/default_environment/stylesheet/language_nix.css
index afc2665..6ef1993 100644
--- a/default_environment/stylesheet/language_nix.css
+++ b/default_environment/stylesheet/language_nix.css
@@ -1,8 +1,23 @@
+:root {
+  --srclg-nix-srchl-keyword-color: #1a936f;
+  --srclg-nix-srchl-comment-color: #048a81;
+}
+
+@media (prefers-color-scheme: light) {
+  :root {
+    --srclg-nix-srchl-keyword-color: green;
+    --srclg-nix-srchl-comment-color: #bfbccb;
+  }
+}
+
 .main_content {
   .src_block {
     &.srclg_nix {
       .srchl_keyword {
-        color: green;
+        color: var(--srclg-nix-srchl-keyword-color);
+      }
+      .srchl_comment {
+        color: var(--srclg-nix-srchl-comment-color);
       }
     }
   }