Predawn is a minimal interface theme and a syntax color scheme. It was originally just a slightly tweaked version (called Flatland-Alt) of the Flatland theme, which itself is a flat reworking of Soda. I decided to keep going with cusomization and rework the entire theme. But I owe a lot to Flatland and Soda. Thanks guys!
Either, search for it in the Packages section in you Atom settings tab. Or from the command-line run:
apm install predawn-ui
Also, view on Atom.io at http://atom.io/packages/predawn-ui
I also highly reccomend installing the accompanying syntax theme, called predawn-syntax.
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.