diff --git a/src/onedev.user.css b/src/onedev.user.css
new file mode 100644
index 0000000..6a36ede
--- /dev/null
+++ b/src/onedev.user.css
@@ -0,0 +1,48 @@
+/* ==UserStyle==
+@name           Gruvbox for OneDev
+@namespace      git.m3.fyi/Marsn3
+@version        1.0.0
+@description    Gruvbox Theme for OneDev
+@author         Marsn3
+@homepageURL https://git.m3.fyi/Marsn3/userstyles
+@updateURL https://git.m3.fyi/Marsn3/userstyles/~raw/main/src/onedev.user.css
+@license MIT
+==/UserStyle== */
+
+@-moz-document domain("git.m3.fyi") {
+  :root {
+    --bg_h: #1d2021;
+    --bg: #282828;
+    --bg_s: #32302f;
+    --bg1: #3c3836;
+    --bg2: #504945;
+    --bg3: #665c54;
+    --bg4: #7c6f64;
+
+    --fg: #fbf1c7;
+    --fg1: #ebdbb2;
+    --fg2: #d5c4a1;
+    --fg3: #bdae93;
+    --fg4: #a89984;
+
+    --red: #fb4934;
+    --green: #b8bb26;
+    --yellow: #fabd2f;
+    --blue: #83a598;
+    --purple: #d3869b;
+    --aqua: #8ec07c;
+    --gray: #928374;
+    --orange: #fe8019;
+
+    --red-dim: #cc2412;
+    --green-dim: #98971a;
+    --yellow-dim: #d79921;
+    --blue-dim: #458588;
+    --purple-dim: #b16286;
+    --aqua-dim: #689d6a;
+    --gray-dim: #a89984;
+    --orange-dim: #d65d0e;
+    --monospaceFontFamily: "ComicCodeLigatures Nerd Font", "Ubuntu Mono",
+      monospace, emoji;
+  }
+}