A color adjustment system includes a memory and a processor. The memory stores instructions. The processor is configured to access the instructions to perform the following: accessing an image; providing a control interface having control points distributed thereon, and the plurality of control points defines a plurality of areas on a color plane; in response to one of the control points being moved from a first location to a second location on the color plane, selecting adjusting areas adjacent to the first location, in order to redefine an original chroma in the adjusting areas to an adjusted chroma; and determining whether pixels of the image match the original chroma in the adjusting areas, and displaying the pixels with the adjusted chroma if the pixels are matched to the original chroma.