Rationally it makes some sense, but irrationally - charging money for such triviality as a choice of colors is ridiculous.
I can see buying _icons_ being a bit more justified, because it implies at least some amount of non-trivial work on your end, but I don't really know anyone willing to pay for better code editor icons.
Also the fact that you offering to buy a "license" is off-putting, again considering the context of selling a set of RGB values. It's too grandiose, which too contributes to this looking nuts. Just say "buy" the scheme and it'll already be much better.
I understand charging for a code editor theme is not common practice. However, I don't see much difference between the work that goes into designing and developing a simple (Wordpress) web theme and a code editor theme. In the end a web theme is also a set of RGB values and other styling settings. And charging for that is acceptable.
I think it depends on what you think is trivial and what is not. I think designing a coherent theme is not trivial.
I can see buying _icons_ being a bit more justified, because it implies at least some amount of non-trivial work on your end, but I don't really know anyone willing to pay for better code editor icons.
Also the fact that you offering to buy a "license" is off-putting, again considering the context of selling a set of RGB values. It's too grandiose, which too contributes to this looking nuts. Just say "buy" the scheme and it'll already be much better.