Continuous Color Tables
An example of a color table that defines a transition from blue to red:
% Continuous
0 0 1
1 0 0
Each line, from left to right, contains the red, green, and blue components (RGB) of a color. The components are floating-point values between 0 and 1. The table can contain an arbitrary number of colors.
Each color can contain an optional fourth component, which represents the length of the interval between the two colors. For N colors, there are N−1 intervals. An example of a color scale that defines a sharp transition from blue to magenta followed by a slow transition from magenta to red:
% Continuous
0 0 1 1
0.5 0 0.5 10
1 0 0