Specify color-scheme for each theme

Author: Dubzer

templates/style/_themes.scss

@@ -1,5 +1,6 @@
 // Standard white theme
 html {
+  color-scheme: light;
   --color-background-code: #f5f5f5;
   --color-background: #fff;
   --input-color: #000;
@@ -35,6 +36,7 @@ html {
 // block below and change the colors
 
 html[data-theme="dark"] {
+  color-scheme: dark;
   --color-background-code: #2a2a2a;
   --color-background: #353535;
   --input-color: #111;
@@ -67,6 +69,7 @@ html[data-theme="dark"] {
 }
 
 html[data-theme="ayu"] {
+  color-scheme: dark;
   --color-background-code: #191f26;
   --color-background: #0f1419;
   --input-color: #c5c5c5;