ConstReadonlyPAD: 0Outside the defined interval, the color of the closest color stop is used.
ReadonlyREFLECT: 2The color line is repeated over repeated intervals, as for the repeat mode. However, in each repeated interval, the ordering of color stops is the reverse of the adjacent interval.
ReadonlyREPEAT: 1The color line is repeated over repeated multiples of the defined interval
The values of this enumeration determine how color values outside the minimum and maximum defined offset on a ColorLine are determined.
See the OpenType spec COLR section for details.