Sets the blend color to use for the given joystick's nub, label, outline and notch sprites.
PRVirconJoySetBlend(joyId, nubBlendColor, labelBlendColor, outlineBlendColor, notchBlendColor) 
The joystick ID.
The blend color to use for the joystick's nub sprite.
The blend color to use for the joystick's label sprite.
The blend color to use for the joystick's outline sprite.
The blend color to use for the joystick's notch sprites.
n/a