Color schemes doesn't work unless we are talking about a dozen standard schemes. Otherwise, it is drowning users in choices. What we needed is an interactive fine tuning. Doing it with config files isn't working. We need a web application for that. Give me a dozen also template, and let me fine tune from there. Export, done.
There are a bunch of tools that generate color schemes for other tools based on a template of their configs. For example pywal is a popular one: https://github.com/dylanaraps/pywal But pretty much every major scripting language like JS, ruby, etc. has their own take on the same idea.
Base16 is another popular one with a ton of implementations: https://github.com/chriskempson/base16