Feat: Replace color variables according to design draft #3221 (#9305)

### What problem does this PR solve?

Feat: Replace color variables according to design draft #3221

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/dataset/testing/index.tsx

@@ -44,7 +44,7 @@ export default function RetrievalTesting() {
         <section className="flex divide-x h-full">
           <div className="p-4 flex-1">
             <div className="flex justify-between pb-2.5">
-              <span className="text-text-title font-semibold text-2xl">
+              <span className="text-text-primary font-semibold text-2xl">
                 Test setting
               </span>
               {/* <Button variant={'outline'} onClick={addCount}>