Function [c,x] = reluxcolourmap(v,showplots); returns a colour maps designed by Relux. These "universal pseudocolour palettes" were introduced in Relux version 2020.2.0.0 (on 2020-10-15). If input argument v == 1 or 2, a colour map with 31 or 16 colours is returned, respectively. The first colour map is used for e.g. illuminances in lux, the latter for daylight factors in percent. The second output argument x gives the standard value of the lower bound of each interval represented by the respective colour. If v == 3, a colour map of 29 colours is returned; it has been based on the map with 31 colours where colours 7 and 11 have been taken out. The colour maps show a series of subsequently alternating darker and lighter colours. Therefore, they are well suited for (false- colour) contour plots: it is easy to link a certain colour to its value interval. The colour maps were taken from Relux version 2020 and 2021. (c) 2026 fabien van mook 2026.08.20 release of this file within package "fvm-colourgrade" under GNU GPLv3+