Returns the list of colors extrapolated between the esqLABS colors blue, red, and green.
Details
For nrOfColors == 1, the esqLABS-blue is returned For nrOfColors == 2,
the esqLABS-blue and green are returned For nrOfColors == 3, the
esqLABS-blue, red, and green are returned For nrOfColors > 3, the three
esqLABS colors are fixed, and the remaining colors are extrapolated from blue
to red to green. If nrOfColors is uneven, the blue-to-red section becomes
one color more than the red-to-green section. In this implementation,
blue-to-green is not considered.
