Why is it called One _Half_ and what is the difference from Atom's "One"?

[amn]

Hi Son,

I see variations and adaptations of your "One Half" color scheme across the Internet, so would like to ask -- how is this different from "One", can the difference be easily described? I would like to incorporate the scheme into some of the software I use but lack of consistency between different implementations makes it difficult, so I thought I'd backtrack my way all the way to Atom's original "One" scheme, then take it from there through your idea with "One Half".

I hope I am making myself clear here :)

Thank you.