The Colorado D.O.R. says that due to increased fraud prevention/detection measures, their processing "could delay refunds up to 60 days beyond the time frames of prior years." This doesn't mean it will take that long for all returns, but there could be delays.
First, check with this tool to be sure you state return was successfully efiled and accepted:
https://shop.turbotax.intuit.com/efile/efile_status_lookup.jsp
Here's
how to track the Colorado state refund. After you click on Colorado,
the new FAQ will have a link on how to check on the refund, and also a
link on how to contact the VA state tax agency.
FAQ: How do I track my state refund?
https://ttlc.intuit.com/replies/3300211