Worked on improving UI stability and visual consistency in the google/blockly repository, focusing on a targeted bug fix for the Zelos Renderer’s dropdown menu text color. Addressed an accessibility issue by updating CSS class names to ensure white text displays correctly across all dropdown menus, reducing visual confusion and enhancing user experience. Used CSS and TypeScript to implement and verify the fix, ensuring consistent rendering across browsers and themes. Maintained code quality by linking the change to a specific issue and delivering a focused, single-purpose commit, which supports easier maintenance and rollback while minimizing the surface area of the update.