ContrastCurve
A class containing a value that changes with the contrast level.
Usually represents the contrast requirements for a dynamic color on its background. The four values correspond to values for contrast levels -1.0, 0.0, 0.5, and 1.0 respectively.
Creates a ContrastCurve object.
Parameters
low
Value for contrast level -1.0
normal
Value for contrast level 0.0
medium
Value for contrast level 0.5
high
Value for contrast level 1.0