Tsuihou Hime wa Dai Majutsushi ni Hirowareru

Born with red eyes and white hair, the same traits as the hated dragons, Princess Aira of the Tadan Kingdom was shunned by all and eventually cast out of the castle. Hiding her hair and eyes, she lived quietly as an apothecary until one day her secret was exposed by a chance encounter with her younger sister. Just then, the greatest mage of the age appeared before her. This is the story of a hidden princess and a genius mage, and their awkward yet heartwarming romance.

https://www.cmoa.jp/title/299828/