An OLED display panel, a fabricating method, and a display apparatus are disclosed. The OLED display panel includes a base substrate; an anode layer, a cathode layer and an organic light emitting layer between the anode layer and the cathode layer arranged on the base substrate, the organic light emitting layer being configured to emit light having third color; and first light emitting unit, second light emitting unit and third light emitting unit arranged on a light emitting side of the organic light emitting layer and independent from each other, and configured to emit, under the action of the light having the third color, light having a first color, light having a second color and light having the third color, respectively, the light having the first color, the light having the second color and the light having the third color being configured to generate white light when being mixed.