The best alternatives to HyperTheme Editor are Rainglow Color Themes, Themer, and DronaHQ. If these 3 options don't work for you, we've listed a few more alternatives below.
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Rainglow Color Themes is a collection of 320+ original color themes created by Dayle Rees for a variety of editors including VSCode, Jetbrains IDEs, Sublime Text, Atom and more. All themes feature a contrast an...
Themer takes a set of colors and generates text editor themes, terminal themes, and desktop/device wallpapers. (As well as themes for other apps like Slack and Alfred.)