What color system has an open ended structure?

The HSL (Hue, Saturation, Lightness) color system has an open-ended structure, allowing for a wide range of colors to be represented by varying the three parameters of hue, saturation, and lightness. Unlike fixed systems like RGB or CMYK, HSL can produce an infinite number of shades and tints, making it versatile for various applications in design and digital media. Its intuitive approach also aligns closely with human perception of color, making it user-friendly for artists and designers.