I've always seen depictions of Jesus always wearing the same outfit. A long white robe, usually down to his ankles, and a red sash over his shoulder. It's simple, but you can instantly recognize it. Especially in cartoons/comics, or any shorthand depiction.
And, I've heard and looked up decent amounts of discussions about how Jesus's appearance in regards to race is depicted, but his clothing always seems to be left out. When I tried to look up this question, I only really found conversation about his physical appearance. Never his clothing.
Why is that? Is there something symbolic about the colors? Did some painting where he wears the outfit become extremely ubiquitous?
This question has been asked previously on this subreddit: link
To quickly summarize, this is actually how Jesus is described in The Book of Revelations. Artists take their interpretation of Jesus wearing red from the Bible directly. It symbolizes the Eucharist and/or Jesus’s sacrifice for mankind.
It’s also common to see Jesus depicted wearing purple over his robes, this also is described in the Bible in Mark 15:17:
And they clothed him with purple, and platted a crown of thorns, and put it about his head [KJV]