doc: change accent color

Author: ntamas

mkdocs.yml

@@ -21,6 +21,7 @@ theme:
     - media: "(prefers-color-scheme: light)"
       scheme: default
       primary: red
+      accent: red
       toggle:
         icon: material/brightness-7
         name: Switch to dark mode
@@ -29,6 +30,7 @@ theme:
     - media: "(prefers-color-scheme: dark)"
       scheme: slate
       primary: red
+      accent: red
       toggle:
         icon: material/brightness-4
         name: Switch to light mode