I was originally going to give him gorgeous dark brown and yellow stripes, but I realized it would be incredibly hard to animate.
For those wondering why my triceratops has no cheeks: I am of the belief that they had full beaks. There are no muscle attachments in the area to suggest fleshy cheeks, and as they are far more closely related to birds than mammals... I agree with the idea that it's more likely that their beaks extended back all the way.
For more info: [link]
For the second sketch: [link]