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/agent/index.tsx

@@ -114,7 +114,7 @@ export default function Agent() {
               </BreadcrumbItem>
             </BreadcrumbList>
           </Breadcrumb>
-          <div className="text-xs text-text-sub-title translate-y-3">
+          <div className="text-xs text-text-secondary translate-y-3">
             {t('flow.autosaved')} {time}
           </div>
         </section>