ceiling not showing correct color

Hello. I’m very new in Unity so I don’t know much. I have a problem with the color of the ceiling. I put white colored material on it but it’s not reflecting white color. It reflects another color instead. I’ve tried fixing it by following other’s troubleshooting steps (trying to change environment reflection intensity), but it’s not working. I have attatched a screenshot of the said problem.205490-screenshot-2.png
Thank you in advance!