All right, first off, I was originally inspired to comment because of that (lollipop? ice cream stick? I know this isn't your lineart, but I just think the width of the stick leads it to be confusing for what it is D: )... the colors don't really match there with any of the other colors in the picture, leading that to be the most important focal point color-wise due to having the most saturation. I'm pretty sure that wasn't supposed to be the intention? Anyway, what I mean to be getting at is, those colors hurt my eyes! I'd go out of my way to pick specific colors that aren't at their most intense, those are really distracting. (oh! and think about the light source, the colors don't really match for that either)

All right, I don't really know much about this character herself, but I do like the sky a lot. Those are nice colors, and they look like she's on a beach. I'd imagine she was for the fact that she's wearing what appears to be a swimsuit, haha. Overall, the colors you've picked to shade her are rather pleasing, but I would look for mroe variety. In almost every cases it seems that you've only shaded with one color on top of a base color, which doesn't really help give a good sense of form. I wouldn't be afraid to use a harsher brush for harsher, more intense places of light (like along the top of her breast etc).

I'd try very much so to keep light sources consistent... the back of the skirt makes her ass look super flat because of how there are light spots shaded on it, when the rest of her body from behind has been shaded darker... so it makes for the skirt flattening out the image. You could remedy this by having the back of the skirt all done with a dark color, then, using a third color to shade even darker areas in the folds instead of reverting to a lighter color to suggest that light enters the back when the body's shading says it doesn't.

Hmm... yeah, I'm trying to keep the critique to solely the coloring, or I'd comment on the face as well. I like the colors you picked out for the bra part of her bikini-- those are very appealing yellows and oranges, seriously. Yeah, I'd say just try and expand your color horizons more. I can tell you get better in picking out colors with each picture, too. Don't be afraid to pick a much darker color for an area without so much light! It seems like there's never enough contrast in your pictures and that you just settle with a color that's slightly darker and slightly different. I'd love to see how you progress in really working with color.

Anyway! I hope that critique was in the slightest helpful in anything and that I've not been super unclear or anything! If you'd like, I could even do a color-over of areas that I was unclear about to show you what I meant.