In the Houdini colorbar HDA, replace the menus selections with red arrows below with the selections above

png file /svs/share/houdini/cbars/images/png/5micrometers_2001-2010.png
tex file /svs/share/houdini/cbars/images/tex/5micrometers_2001-2010.tex
definition /svs/share/houdini/cbars/definitions/gibs/Particulate_Matter_Below_2.5micrometers_2001-2010.xml
credit unknown
reference unknown