The invention discloses a kind of regulate method about display color of display device. The method is that classify the inputted image signals to corresponding grade; adjust the six primitive colors of the display device respectively on the different brightness grade, the six primitive colors is composed of the red, green, blue and the other three new primitive colors, the three new primitive is made from the match of each two primitive colors according to the fixed proportion. Adjust one of the said new primitive colors is equal to adjust the corresponding two primitive colors at one time according to the fixed proportion. The beneficial effect of the invention is that adopting the adjust of six primitive colors, increase the new primitive color between each two primitive colors, make use of the new primitive color to adjust the interspaced color when revising the display devices and hardly judge use which primitive color to do it, this detail adjust is more conform to people's visual custom, and make the abstract unlinear curve intuitionistic and accurate.