Applies a color vector to each pixel in the image. The length of the vector is 0 for black and white and at its maximum for the midtones. The vector weighing function is f(x)=(1-(4.0*((x-0.5)*(x-0.5)))).
Parameters:
tint
String or ImagickPixel object representing the color.
opacity
Float or ImagickPixel object representing the opacity.