A color image projector includes a sequence light color control module; a light guiding structure; a plurality of mono-light sources coupled to the color-light control unit for emitting light of the plurality of mono-light sources in sequence, and wherein the plurality of mono-light sources located at three sides of the light guiding structure; a gray scale display correspondingly configured to a fourth side of the light guiding structure and for displaying gray scale image, and whereby forming red, green, blue images in sequence by the plurality of single-color light sources; and a projection lens correspondingly configured to the display for projecting the red, reen, and blue images sequentially, whereby forming color images by visible persistence.