Do you think that Unicorn coloring page is something modern? Not really. The unicorn is a very ancient mythical creature. The ancient Greeks and ancient Romans were convinced that such an animal really existed. In the Middle Ages, there were also many myths about unicorns. It wasn’t until the Renaissance that the world learned that it was a fantasy animal.
Therefore, this is really a coloring that is associated with antiquity. However, we have given it a modern look for maximum simplification. If you don’t want to do complicated light and shadow work, you can just paint over the outlines of this unicorn according to your imagination.