3.1 version, theme function reports lint error

[Rayzhangzhang]

What version of Tailwind CSS are you using?

v3.1.2

What build tool (or framework if it abstracts the build tool) are you using?

What version of Node.js are you using?

16.14

What browser are you using?

What operating system are you using?

Reproduction URL

Describe your issue

theme('colors[primary] / 20%') reports 'colors[primary] / 20%' does not exist in your theme config..

It works well , but reports a lint error. Do I need to add any config or change the code below in tailwind.config.js ?

...
primary: withOpacity('--color-primary-rgb'),
...

Describe the problem you're seeing, any important steps to reproduce and what behavior you expect instead.

[thecrypticace]

Hey, thanks for reporting this. This should definitely work but we didn't test the quoted syntax with alpha values at all — we don't generally recommend it anymore just for consistency with CSS itself. I've merged the fix in and it'll be in our insiders build fairly shortly which you can test with npm install tailwindcss@insiders if you want to give it a try before we tag a new version.