I'd like to specify the background color of flags for each group I define in the json file in Timeline.js. I'm able to change the background of each slide, depending on the group it belongs to, but the documentation's not clear (to me, at least) on how to go about customizing a group's flags' background color. ".tl-timemarker-content-container" selects for ALL flags. How do I go about adding custom selector css to affect all div/span elements belonging to a group? Thanks!
.tl-timemarker-content-container {
background-color:#cc0000 !important;
}