Those photos are horrible. Can't tell anything from the distant shot which is purple. Individual pieces of grass are no good either. Get a camera and make sure the sun is on the grass, move into about 3ft. from a clump, get some very close up shots, especially where the leaf attaches to the trunk, and make sure they are clear and right color.
How did you get those? Get a good angle (Position yourself) of the light on the grass from the side to about 45 degrees. We'll see. So far, it's almost impossible to distinguish from crabgrass to fescue to stiltgrass. We can rule out broadleaf though.
We all are merely gleaners from the masters who were here before us.