The design of this syntax theme is to offer a dark, subtle color palette. Syntax highlighting focuses on actually highlighting the important language constructs, and using bold font weight to emphasize other important parts.
This theme was crafted with love, and with inspiration from the Chestnut Light Theme and the DuoTone Dark Sea theme.
Much thanks to both of their authors!
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.