How do I add a margin between the gutter and code editor?

[nathfreder]

I have a editor setup, and would like to add some space between the gutter and the code. I would like the yellow in the following example to be white space.

A good example would be a screenshot from Visual Studo Code where the numbers are farther away from the code.

[marijn]

You want a style like .CodeMirror-lines { padding-left: 10px }