How to change the background color of a single cell in a jupyter notebook / jupyterlab?

Question

I design a notebook so that variables that could be changed by the user are grouped into distinct cells throughout the notebook. I would like to highlight those cells with a

Answer 1

Small addition to krassowski's code (tried to add it as comment but couldn't get the formatting to work).

from IPython.core.magic import register_cell_magic
from IPython.display import HTML, display

@register_cell_magic
def bgc(color, cell=None):
    script = (
        "var cell = this.closest('.jp-CodeCell');"
        "var editor = cell.querySelector('.jp-Editor');"
        "editor.style.background='{}';"
        "this.parentNode.removeChild(this)"
    ).format(color)

    display(HTML(''.format(script)))

This way you can use it both as magic and with normal function call:

bgc('yellow')
bla = 'bla'*3

or

%%bgc yellow
bla = 'bla'*3