The color palette is out of date.
This might be a good opportunity to work with T139959: Make static asset wheels for Wikilabels
See also how we did it for wikimedia ui: https://github.com/wiki-ai/flask-wikimediaui
I saw that 138 just updated the assets. I made https://github.com/wiki-ai/wikilabels/pull/139 and https://pypi.python.org/pypi/flask-oojsui to move the assets into a separate repo (see also https://github.com/wiki-ai/flask-oojsui)