All of our bermudas look like this almost every year. Even the common bermudas, if they are thick lawns. We usually get a frost before the grasses go dormant. 2-3 days after the frost, lawns look like this in areas where the frost occured. The hybrids show it more than the commons.
The green areas by the house are still green because the house "blocked" the frost.
This spring, we had a late frost after bermudas had come out. Several of my lawns, looked like this then as well. My guy, had just sprayed a few of those lawns, then we got the frost. A couple of days later, he was freaking, thinking that he had done it.