How Clover the Clever looked like in my head-canon. His color and design based on Yona's costume from Horse Play. The idea come from that one of the unicorns who lost their magic while trying to raise had a clover cutie mark. I assumed Clover was probably alive during that time and being Star Swirl's pupil probably powerful to raise the Sun. So my head-canon is one of the unicorn's was Clover.
I have other head-canon designs and stuff connected to Clover and the founders of Equestria. I may share them later.