Yes they only come in yellow
The 12" one only comes in orange. But you get used to it! Very good wheels. The first time you assemble it (if it doesn't arrive ready assembled) the only thing to check is that the running track is very firmly pushed into the front and back pieces so there is no gap at all on the little plastic joining strip that holds the running track together. So once you've slotted the running track onto the back piece and pushed the front piece on, squeeze the back and front together firmly until there is no gap on the joining piece. Otherwise it can wobble and somewhere for a toe to get caught in the gap. I made that mistake first time I put one together. It seems a bit of a fiddle at first but quick and easy once you get used to it. Also no spindle which is good! The smooth side of the running track goes on the outside.