There is no physical description of him in the Bible, but scholars agree he would have looked like a typical Middle Eastern Jew of the 1st century. Based on historical context:
He would have had olive or brown skin, dark hair, and brown eyes.
He likely had a beard and short hair, in accordance with Jewish customs of the time.
The common image of a white, European-looking Jesus is a result of centuries of Western art and culture adapting his image to fit their own context, rather than reflecting historical reality.