This is a very light, highly saturated theme based on the four-color palette used in the Sho documentation. Its airy look-and-feel emphasizes the sparse, easy aesthetic of languages like Ruby and Haskell: however, its high-contrast and varied color scheme makes it eyestrain-free.
Use a large font size and your formatting will look presentation-ready.
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.