Doesn't ask to be feed, orange colored spit up?

My baby is 3 days old. I'm a FTM trying to get the hang of breastfeeding. I feel as if he doesn't show me signs of hunger. Once in a while he does but I find that I usually just try to feed him if it's been a while. Normal? Also... A little after a feeding, I noticed he had spit up a bit and was almost orange like in color. Why is this?