In the Houdini colorbar HDA under "color options", set the menus like this...


Details:

png file /svs/share/houdini/cbars/images/png/GHRSST_Sea_Surface_Temperature_Anomalies.png
tex file /svs/share/houdini/cbars/images/tex/GHRSST_Sea_Surface_Temperature_Anomalies.tex
definition /svs/share/houdini/cbars/definitions/gibs/GHRSST_Sea_Surface_Temperature_Anomalies.xml
credit unknown
reference https://gibs.earthdata.nasa.gov/colormaps/v1.0/