It really depends a huge amount on what the tone of the comic is going to be; i.e., what the story is like. The first colour-scheme is much lighter in mood (to me, anyway), much more bucolic and pastoral. The second colour-scheme is a little more mysterious, there's a feeling about it that something dark is lurking just out of sight. If you're writing a light, cheerful, birds-singing-in-the-fields summer sunshiny kind of comic, use the first scheme. If you're writing something a bit grimmer or unsettling than that, go for the second.
However, the second needs a little more variety to it. There's too much green there, and that's a bit overwhelming. Perhaps change the colour of the kid's clothes a little?