grade3-syntax is an obvious choice for all those times when you're like... man, I'm feeling pretty nostalgic about 3rd grade right now, but my syntax theme is too punk-rock academy hackerdude supreme.
And when the moment's over, switch back to oceans16 or oceans16-bright themes. If you're feeling it, go dress up your IPython (Jupyter) Notebooks here.
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.