How to change the background colour behind the text to #FEFBF0

I want to change the colour of all the boxes behind the text as you can see a disparity
to fefbf0

It would be super helpful if you could attach a screenshot and highlight the box whose color needs to be changed.

Yes, please consider providing more information so that we can help you. As @prakhar mentions, some screenshots that indicate exactly what you’re trying to change, and even some code snippits could be helpful.