Lately

i don't know why you said its fairly easy to understand, and then hardly explain it...

i think its about the past, and how he wishes he could relive his greatest times again with possibly his loved one. but he realized that no matter how you put it (what color you paint it), its in the past. he knows he has to leave the good times behind but at the same time he realizes that they're a part of him and he'll never fully move on