Inspired by the lovely Sublime Text Spacegray theme by kkga, and another Alfred theme by Indrashish Ghosh. Thanks for the inspiration guys. Hope you enjoy my adaptation.
Download the Dark appearance file by right-clicking on it, and once it downloads, double-click on the file in Finder to install it.
or
Download the Light appearance file by right-clicking on it, and once it downloads, double-click on the file in Finder to install it.
Alternatively, you can execute following commands in Terminal:
curl -O https://raw.github.com/benjamindauer/Spacegray-Alfred-Themes/master/Spacegray%20Dark.alfredappearance
or
curl -O https://raw.github.com/benjamindauer/Spacegray-Alfred-Themes/master/Spacegray%20Light.alfredappearance