How to set a background color for a cell style via a command?

Question

I want to set different background colors for various cell styles (e.g. Section, Text), so that whenever I choose a specific style for some cell in the notebook, it automatically gets colored accordingly. Is this possible to do via evaluating a single simple command inside the notebook?
I've tried, for example, Cell[StyleData["Text"], Background -> Gray], but it doesn't work at all. Is there a way to use SetOptions for this?

bbgodfrey · Accepted Answer

Undoubtedly, there are commands to specify background colors for Default styles, but I found creating Private Style Definitions to be easy and convenient.  With an open notebook, open the Format menu and choose Edit Stylesheet ... to create

Then choose styles from the dropdown menu at the left and format them from the Format menu, in this case by choosing Background colors.  For instance,

To save the result, choose Install Stylesheet at the right and follow the instructions.  Then, close the notebook.  In the future, when opening a notebook, open the Format menu, choose Stylesheet, and select the private stylesheet created earlier.  Styles will have the backgrounds as defined, for instance.

PooryWan · Answer

you can use this command which makes the whole notebook light gray. But I don't know how to change the background of a single cell.
SetOptions[EvaluationNotebook[], Background -> LightGray]

How to set a background color for a cell style via a command?

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