11ty is fast So is Tailwind JIT
I hope you'll try it yourself.
Go edit the theme file
/src/_includes/components/banner.liquid
and change all occurrences of bg-indigo
to bg-green
while running 11ty on a live development server. Watch your page change instantly before your eyes! Tailwind, is recompiling your CSS file behind the scenes, so it's kind of a big deal for it to run this fast.