Some embodiments of the invention provide an image-editing process that non-uniformly adjusts at least one particular color attribute (e.g., saturation level) of pixels in an image. Specifically, the image-editing process of these embodiments uniformly adjusts the particular color attribute of pixels with a first set of values and non-uniformly adjusts the color attribute of pixels with a second set of values. In this manner, some embodiments provide a vibrancy process that non-uniformly adjusts saturation levels of an image in order to preserve saturation levels for skin tones appearing within the image.