A better camouflage is to use prints and patterns. While this may seem like it would make the hip area more pronounced, it does not. The eye is distracted by the multicolored print than the shape of the body. Always remember that color choice is not a science. There is no one way that works for every person.
Illusion is the focus.
Use color as your tool, to create the illusion you desire. Take time with yourself to play with colors and patterns. This is the only way you will gain an understanding of who you are in terms of color. You will no longer be relegated to picking outfits exactly as they are in catalogs. Nor will you be stuck with a boring wardrobe out of fear of experimentation.