It will tell you on your world control how long you have until you can change the colors. The ability to change colors is suppose to be available once every billing cycle, but it doesn’t really seem to match any billing cycle that we have…7 days, 30 days…
It seems to be available once every 2-3 weeks. 
I think it’s good that we don’t have to wait too long (ie: 30 days)
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