darker-one-dark-syntax
This is just edited one-dark theme, its just darker and colors are more colorful.
darker-one-dark-syntax
This is just edited original One Dark syntax, but this syntax is made more colorful and darker.
Original syntax comparsion
Try to compare the images when you open them in a new tab.
Original one dark syntax
Darker one dark syntax
I recommend to use this syntax with original one-dark UI theme, it looks way better than the other built-in UI themes.
Installation
Via command line
apm install darker-one-dark-syntax
Via atom
Go to Settings > Install and next to the search bar select themes, than search for darker-one-dark-syntax. And install it obviously.
After installing, go to Settings > Themes > Syntax Themes and select "darker-one-dark-syntax" from the drop-down menu.