White went yellow.. how to fix?

I have a scene in a sleeve and my white went real ugly.. turned yellow and blotchy and looks dirty! I don't really want color there but would be ok with a light Grey.. Do you think Lt Grey would be a good solution? If not, what do you suggest I do to fix this problem? :) Also have red roses and they are quite dark.. how do I lighten them so they are bright and not so dark and muddy? Any advice would help.. thank you!

it is difficult to say what went wrong with your colors with out seeing your tattoo, however, it sounds as if your tattooist didnt clean his tubes well enough when he changed colors, and you now have a mixture of colors in your piece. If you trust your artist, go back and get it fixed, if you do not trust him, find someone reputable to fix it. there are a good amount of great custom artists out there, I am sure that with a little research you can find someone who can make your tattoo more appealing to you. keep in mind this is just an opinion of what you discribed, with out actually seeing the work I cannot give a firm answer