Consider standardizing site themes and/or customizing colors to align with NMDC brand

[eecavanna]

Documentation related to customizing the color palette of a MkDocs site using the Material for MkDocs theme (e.g. the Runtime docs site): https://squidfunk.github.io/mkdocs-material/setup/changing-the-colors/

Documentation related to customizing the color palette of a Sphinx-based site using the Read the Docs theme: TBD

[eecavanna]

My favorite Sphinx theme that I've come across so far is PyData. The Jupyter documentation and Pandas documentation, for example, both use PyData.

[eecavanna]

Here's what one of the pages of our documentation website looks like with the PyData theme active and at least partially configured, in "light mode" (as opposed to "dark mode").

For comparison, here's what it looks like today, with the Read the Docs theme active.