A chickenpox colored flat map is an illustration or diagram that depicts the rash or skin lesions characteristic of chickenpox in a flat, two-dimensional form. Chickenpox, caused by the varicella-zoster virus, typically presents with itchy, fluid-filled blisters on the skin that may appear in clusters. These blisters can be depicted in various stages of development on a colored flat map, showing the progression of the rash over time.