The HSV color model mapped to a cylinder. POV-Ray source is available from the POV-Ray Object Collection.
Hsl-hsv_models.svg
HSL_color_solid_cylinder_alpha_lowgamma.png
HSV_color_solid_cylinder_alpha_lowgamma.png
Hsl-hsv_models.svg: Jacob Rus
HSL_color_solid_cylinder_alpha_lowgamma.png: *HSL_color_solid_cylinder.png: SharkD
derivative work: SharkD  Talk 
HSV_color_solid_cylinder_alpha_lowgamma.png: *HSV_color_solid_cylinder.png: SharkD
derivative work: SharkD  Talk 
derivative work: SharkD  Talk