EEEEE YOSHART it is beautiful and so cool and I love it and want more. I dunno what to say re: photoshop and weird colors. Are you setting the quality to 100%? That's honestly the only thing I can think of. Maybe don't save it in .jpg? No idea. ANYWAY.

- The shading on her torso makes her look too skinny. I reeeally like the purple color but specifically where it's at on her tummy is contributing to the problem here, I think

- More dynamic shading! The purple is great but other then that there's really not a lot of color expiermentation goin' on, which is a shame. In the desc. you said you wanted to finish coloring so you could add in a bg but really, the coloring on Ariel should be affected BY the bg. If you're going to have her in a blue bg (so I'm assuming, I mean, she's a mermaid and they're usually in water) Her skin should reflect this (and it maybe it should replace the purple then) A lot of people don't like using weird ass colors when they draw because no one thinks that green or blue or whatever belongs in skin but if you try it out, it actually ends up looking pretty cool (when used appropriately)

- For the lighting, you don't seem to have a color at all but the white. The white, painted on like all the other colors, doesn't do a lot for her and it kinda just looks murky and unnatural on her skin and specially on the purple flower/shellbra.

- Speaking of the purple, the shading is very dull compared to the skin and tail area

- This is a personal thing but when I color skin, I set the bleed to high and I add in some light red to the skin tone. It just makes it feel more fresh, imo

THAT'S IT can't wait to see the finished result. must sleep now.