The skeleton was strange, instead of being an actual white/black he is yellow instead similar to Frisk's default skin. A shadow is cast over his front making his expression hard to see and he has an orange outline right around his body, instead of black he has glowing white eyesockets and black eyelights an open toothy mouth with a wide grin. He takes the appearance of Sans, but in all orange/yellow. He can take any forms, but it seems like he is, as usual being Sans for now.