diff --git a/src/css/variables.css b/src/css/variables.css
index 6e8317b43ae147361906279bc584d5455fef4511..d0d8d66848684674cbe13409e475180b681694e6 100644
--- a/src/css/variables.css
+++ b/src/css/variables.css
@@ -34,7 +34,11 @@
     --ifm-navbar-shadow: none;
     --ifm-button-shadow: 1px 3px 4px var(--ifm-color-secondary-darkest);
 
-    /* Base colors */
+    /* Base colors
+       https://infima.dev/docs/utilities/colors
+       https://coolors.co/000000-ffffff-805d93-e07931-b3433b
+     */
+
     --ifm-color-primary: #000000;
     --ifm-color-secondary: #ffffff;
     --ifm-color-success: #577018;