Replacing a Colour with FieldID in CSS

[kh99]

If you want each post author's color selection to be used in the postbit, then you can't put it in the CSS. But you could use it directly in the postbit template.

ETA: or if you must put that info in the CSS and you have a relatively small number of choices, you could make a class for each one then have the dropdown values be the class names, and then use the class name in the postbit template.