Dinos and Cyano can look almost identical, color blind or not...lol. The only true way to tell which it is, from what I've read, is to pay attention to how it looks first thing in the morning. At night, Dinos all die off and appear to be gone in the morning. But then, after a few hours of lights, they're back in force. Cyano won't recede at night. It's some nasty stuff and toxic to inverts, snails or fish that eat it. If the 3 days of lights out don't kill it, the next step is to try raising your pH. Those are the only two successful remedies I've read about. Blowing it off the rocks, with a turkey baster, actually makes it spread faster and worse. Some even say that something about doing water changes can make it worse.
