I can just imagine James and Lily be mad that he died and left Harry alone, but they know its not his fault. Sirius wants to beat himself up though, and the three hang on to the hope that Harry won't be the next one through the Veil.
They would have to change color scarves. The robes are black though either with the Hogwarts crest or they sew on their house crest. Whoever said that they didn't mention scarves and ties in the book is wrong.
I didn't cry at all. Okay, maaaybe just a littte bit. I teared up. OKAY, I'M CRYING MY FREAKIN' EYES OF! <--- It's okay, previous pinner. It's going to be alright. *starts sobbing with them* <---- *collective wailing*<<---Mischief Managed