diff --git a/templates/forum/macros.twig b/templates/forum/macros.twig
index a52a62d..8ac110c 100644
--- a/templates/forum/macros.twig
+++ b/templates/forum/macros.twig
@@ -478,7 +478,7 @@
         {% set author_id = post.user.id %}
         {% set author_name = post.user.name %}
         {% set author_title = post.user.title %}
-        {% set author_colour = post.colour %}
+        {% set author_colour = '--accent-colour:' ~ post.colour %}
         {% set author_country = post.user.countryCode %}
         {% set author_created = post.user.createdTime %}
         {% set author_posts_count = post.postsCount %}