I’ve recycled this old line art of a Gorgosaurus libratus (a smaller cousin of T. Rex) by giving it a color scheme inspired by Lisa Frank.
If you were a little girl growing up in the 1980s and 90s, you might have seen school supplies decorated with animals splashed with extremely bright colors (especially pinks and purples). The artist behind all those was a lady named Lisa Frank, and she and her company are still alive as I type this. I don’t think she did too many dinosaurs, but if she did, I’d imagine they’d have colors like this.