diff --git a/src/palette/gitea.ts b/src/palette/gitea.ts
index 2ec1e9e..878df1b 100644
--- a/src/palette/gitea.ts
+++ b/src/palette/gitea.ts
@@ -22,6 +22,7 @@ import type { ThemeVars } from "../core";
 import { scaleColorLight } from "../functions";
 import type { Ansi, Console, Diff, GitHub, Message, Named, Other, Primary, Secondary } from "../types";
 import { themeVars } from "../types";
+import { type DeepPartial, deepOverride } from "../utils";
 
 export type GiteaColor = {
   isDarkTheme: boolean;
@@ -33,6 +34,8 @@ export type GiteaColor = {
   console: Console;
   diff: Diff;
   other: Other;
+  /** 自定义 GitHub 主题变量映射，未填写的字段自动使用默认值 */
+  github: DeepPartial<GitHub>;
 };
 
 export function gitea2ThemeVars(giteaColor: GiteaColor): ThemeVars {
@@ -176,6 +179,6 @@ export function gitea2ThemeVars(giteaColor: GiteaColor): ThemeVars {
       console: giteaColor.console,
       diff: giteaColor.diff,
     },
-    github,
+    github: deepOverride(github, giteaColor.github),
   };
 }