Color model representations. (A) RGB color model represented as a cube, where each axis corresponds to one primary color channel (Red, Green, Blue). The RGB model is additive, with colors formed by combining different intensities of each channel. The grayscale axis runs diagonally from the black (0,0,0) to white (1,1,1) corner, representing shades of gray. (B) HSV color model represented as a cone, formed by projecting the RGB cube along the grayscale axis. The cone consists of stacked hexagonal disks, with the size of each disk increasing as value (V) rises. The apex of the cone represents black, while the base is white, illustrating the relationship between brightness and saturation. As value increases, the disks become larger and more saturated, transitioning from black at the tip to white at the base.
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