[It would have been easy for Oscar to run, but that he didn't speaks volumes of why Dipper wants to give him a chance.]
[Anyway, any coherent thought screeches to a halt when Oscar points out the color of his fingernails. So, he knows that colors are important on Remnant. It's hard not to put that together from just looking at them, let alone observing auras and also just having spent a lot of time around people from Remnant.]
[The significance of someone wearing another person's color hadn't occurred to him, though. It also didn't occur to him that the people of Remnant might assign colors to others that did not come from their world. There's a lot here that catches Dipper off guard.]
1/3
[Anyway, any coherent thought screeches to a halt when Oscar points out the color of his fingernails. So, he knows that colors are important on Remnant. It's hard not to put that together from just looking at them, let alone observing auras and also just having spent a lot of time around people from Remnant.]
[The significance of someone wearing another person's color hadn't occurred to him, though. It also didn't occur to him that the people of Remnant might assign colors to others that did not come from their world. There's a lot here that catches Dipper off guard.]
[But in a good way. His face burns bright red.]
I- You-