Helo once again,
Reflux is a great tool for having custom themes in the replit ide.
However, users have to make their own or pick a preset. To solve that, I made Reflux Marketplace. See here Here you can preview themes, as well as copy the code necesary for that theme.
(Also ping me on replit discord (SnowCoder#5223) if you want a Tampermonkey version for any of the themes)
I can confidently say that even an ordinary person can create a marketplace now. The main thing here is to take a competent and painstaking approach to this, so that this marketplace can then really start working and bring in profit. I already know how to achieve this and can help you with this too. For example here you can learn custom marketplace development and you already know how to do it. I myself have created it under the same scheme and still have excellent income from it.