How to develop a custom theme?

[itsmeadarsh2008]

Hey there! 👋

Got a quick question about the custom theme we're cooking up. Wondering about the magic behind the scenes:

Primary Background Color: [Insert Hex or RGB Value]
Secondary Color: [Insert Hex or RGB Value]

I know this is a pure CSS framework. But still, I want the custom theme for this. Any extension (*.js) [script] that uses dictionaries
{"primaryColor":"[Hex]",. . . .}

OR Rebuild a personal custom-flavoured independent stylesheet (*.css). I'm familiar with Scss (Sass)
I'm excited to see how these will add flair to our project! Feel free to let me know if you need more details.