This function creates colors of class ``LAB''; a subclass of the virtual
LAB(L, A, B, names)
|L, A, B||
these arguments give the L, A and B coordinates of the colors.
The values can be provided in separate
a vector of names for the colors (by default the row names of
An object of class
LAB which inherits from class
B values give the coordinates of the
colors in the CIE \(L^*a^*b^*\) space. This is a transformation
of the 1931 CIE XYZ space which attempts to produce perceptually based axes.
Luminance takes values between 0 and 100, and the other coordinates take
values between -100 and 100. The \(a\) and \(b\) coordinates measure
positions on green/red and blue/yellow axes.