Details:
| png file | /svs/share/houdini/cbars/images/png/diff-rgb.png |
| tex file | /svs/share/houdini/cbars/images/tex/diff-rgb.tex |
| definition | /svs/share/houdini/cbars/definitions/cmocean/diff-rgb.csv |
| credit | Kristen Thyng | reference | https://matplotlib.org/cmocean/ |