A JupyterLab theme extension which provides a simpler theme from a more civilized time.
Here is what it took to get this working in a dev build:
npm install; npm install typescript; npm run build; npm run build:webpack; jupyter labextension install --debug .
or install from npm (may be old):
jupyter labextension install @nfultz/jupyterlab-theme-simple-extension
npm login # creds
npm publish --access public