[shortcode] – color code

Hi,
I’ve added a shortcode placement this way
C = function () {
if (!r) {
var e = {
myshortcode: [“\r[myshortocode]”, “\r”],

is there a way to colour it?
I’ve tried adding
.cm-s-default .cm-shortcode {
color: #00f
}
but no results.
thanks.

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