diff --git a/website/src/pages/colorful/index.tsx b/website/src/pages/colorful/index.tsx
index cf083ece..e43e807a 100644
--- a/website/src/pages/colorful/index.tsx
+++ b/website/src/pages/colorful/index.tsx
@@ -17,7 +17,7 @@ function Example() {
       />
       <div>
         <label>
-          <input type="checkbox" checked={!disableAlpha} onChange={(evn) => setDisableAlpha(evn.target.checked)} />
+          <input type="checkbox" checked={disableAlpha} onChange={(evn) => setDisableAlpha(evn.target.checked)} />
           Show Alpha
         </label>
       </div>