Power Blending

I use both graphics and images in my design work and sometimes have trouble blending the colors to make the design more cohesive to bring the elements together. So, the ability to map all the colors of an image and then the ability to replace the closest available matching color in the graphic with this color to bring unity to the design and help it to both blend together and allow the design to stand out! the ability to adjust color theme accordingly for both image and graphic to perfect the image would also be nice but mostly for alteration of graphics to make them more realistic!