Styling Read Only Input

Summary

adjusting color of read only fields

Content

Similar to this post: https://cloudcustomerconnect.oracle.com/posts/4c17376800

I need to make the read only shade a darker gray. I am able to make this happen for "textInputs", with the code mentioned in the thread above.

However, I also need to do this for the checkbox inputs and possibly some radio inputs.

When I try the code snippet attached, the color does not register. According the documentation, these can be styled with "borderColor" and "fillColor"

Also, once I get the all the inputs to be colored correctly, what's the best way to refactor the code for  all inputs at once -textInput, checkboxInput, etc?