A color conversion panel includes a substrate, a light blocking layer on the substrate, and color conversion layers and a transmission layer on the substrate, the color conversion layers including a quantum dot, wherein the light blocking layer includes a first sub-light blocking layer overlapping the color conversion layers and the transmission layer, and a second sub-light blocking layer between adjacent ones of the color conversion layers and the transmission layer, and wherein each of the first sub-light blocking layer and the second sub-light blocking layer includes an external light absorption layer on the substrate, and a reflection layer on the external light absorption layer.