diff --git a/layouts/partials/head.html b/layouts/partials/head.html
index 0ddba873..359ea31d 100644
--- a/layouts/partials/head.html
+++ b/layouts/partials/head.html
@@ -99,7 +99,7 @@
   {{/* CSS */}}
   {{ $cssResources := slice }}
   {{ $schemeName := .Site.Params.colorScheme | default "blowfish" }}
-  {{ $cssScheme := resources.Get (printf "css/schemes/%s.css" $schemeName) | default (resources.Get "css/schemes/blowfish.css") }}
+  {{ $cssScheme := resources.Get (printf "css/schemes/%s.css" (lower $schemeName)) | default (resources.Get "css/schemes/blowfish.css") }}
   {{ $cssResources = $cssResources | append $cssScheme }}
   {{ $cssResources = $cssResources | append (resources.Get "css/compiled/main.css") }}
   {{ with resources.Get "css/custom.css" }}