Generate pleasing HSL colormaps easily.


Updated 4 Feb 2015

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Generate hue-saturation-lightness colormaps

USAGE: hslcolormap(N,H,S,L)

N: number of colors in colormap.
H: hue stops (optional). %can also be specified using a string: rygcbmRYGCBM
S: saturation stops (optional)
L: Lightness stops (optional)

The stops are placed evenly over the colorscale. Parameter examples:
H=[0 1/6]; %colorscale runs from red to yellow
S=[0 1]; %gray to fully saturated
L=[.3 1 .3]; % dark-bright-dark

Using L with two-stops (e.g. L=[.2 .8]) makes it easy to distinguish
high and low values.

Using a symmetric L with 3 stops (e.g. L=[.2 1 .2]) is useful for divergent

Discontinuities in the colormap can be indicated with nans.

caxis([-6 6])
hslcolormap(300,'g.m',1,[.1 1 .1]);

(c) Aslak Grinsted 2014

Cite As

Aslak Grinsted (2023). hslcolormap (https://www.mathworks.com/matlabcentral/fileexchange/48586-hslcolormap), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2014b
Compatible with any release
Platform Compatibility
Windows macOS Linux

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Version Published Release Notes

can now take hue inputs as string. e.g. y=yellow=1/6

added discontinuity feature, and added html example

added screenshot