Clone and run for a quick way to get started with vscode-theme-generator.
You need NodeJS installed to run the generator.
npm installMake your changes to the colors in index.ts and hit F5 to build the theme and launch the a new VS Code window with your theme available in the command palette (ctrl/cmd+shift+p > "Color Theme").
When you're ready to publish your theme just fill out the "name", "displayName", "publisher"and"description"` values in the package.json and publish it like any other extension.