An RGB colour curve with an interpolation mode for each span.
The driver samples it at the time that its frequency selects and returns (r, g, b).
List2<U8> = [] How the curve gets from each key to the next, one entry for each span between two keys. Which value selects which interpolation is not established for this class. The float curve uses the modes listed on VfxAnimatedFloat.
Random variation tables. The driver draws no random numbers for this curve, see VfxColorRgbBase.
List2<F32> = [] The positions of the keys on the driver's time source: seconds for the time sources in seconds, fractions for the others.
List2<Vec3> = [] The colour at each key, (r, g, b), one entry for each entry of times.