Critique on comic color scheme

So, I finished inking that two page comic I was working on, and have scanned it in and am starting to play around in photoshop with colors and such. I'm not very well versed in either photoshop or color palettes, so I'd like for anyone who cares to to comment on this. I've got the general colors of the backgrounds in place, and some coloring on objects. What do you think? Do the overall colors work? How should I be coloringg this piece?

The Debut of Uncle Vernon the Pig

It's Uncle Vernon! He's a pig.

And a right proper one at that, too. He's very snooty, apparently like Monsieurs James and Phil, who do not wish to grace this blog with their artwork or comments. Yeah, that's right! I called you out! On that blog that you started but don't read anymore! BURN!