Jagex uses a 16-bit HSL color format within their engine, limiting them to 65,535 distinct colors.

RGB color pickers allow for 16.7 million colors. The color you select may not exist within the 16-bit palette and will be approximated, which can lead to slightly different results.

This tool generates a color palette using Jagex's 16-bit HSL format: 6 bits for hue, 3 bits for saturation, and 7 bits for lightness.