diff --git a/app/config.py b/app/config.py
index e64060c..e4708e5 100644
--- a/app/config.py
+++ b/app/config.py
@@ -49,6 +49,7 @@ class Config(pydantic.BaseModel):
     trusted_hosts: list[str] = ["127.0.0.1"]
     manually_approves_followers: bool = False
     privacy_replace: list[_PrivacyReplace] | None = None
+    code_highlighting_theme = "friendly_grayscale"
 
     # Config items to make tests easier
     sqlalchemy_database: str | None = None
@@ -106,8 +107,7 @@ EMOJI_TPL = '<img src="/static/twemoji/{filename}.svg" alt="{raw}" class="emoji"
 
 _load_emojis(ROOT_DIR, BASE_URL)
 
-# TODO(ts): allow to override this
-CODE_HIGHLIGHTING_THEME = "friendly_grayscale"
+CODE_HIGHLIGHTING_THEME = CONFIG.code_highlighting_theme
 
 
 session_serializer = URLSafeTimedSerializer(
diff --git a/app/scss/main.scss b/app/scss/main.scss
index e0252e6..a4de209 100644
--- a/app/scss/main.scss
+++ b/app/scss/main.scss
@@ -8,6 +8,7 @@ $form-background-color: #ccc;
 $form-text-color: #333;
 $muted-color: #555; // solarized comment text
 $primary-button-text-color: #fff;
+$code-highlight-background: #f0f0f0;
 
 // Load custom theme
 @import "theme.scss";
@@ -60,7 +61,7 @@ a {
 }
 
 div.highlight {
-    background: #f0f0f0;
+    background: $code-highlight-background;
     padding: 0 10px;
     overflow: auto;
     display: block;