AThis theme is based of on the Ayu Mirage Color Scheme by @dempfi - Ayu. I simply changed somethings to give it my custom feel
Install Ayu Mirage Atom Syntax Theme via Atom by going to [Preferences/Settings > Install > Theme] and search for Ayu Mirage Atom Syntax Theme or install through CLI
$ apm install ayu-mirage-atom-syntax
The Ui theme used in the screenshots is Material UI with a little tweak.
atom-ayu-ui coming soon ...
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.