Pro Football Focus grade chart of Raiders roster not too pretty

Recently Pro Football Focus did they annual grading chart where they go color code every player on the Raiders projected depth chart from elite in blue to poor in red. Rookies receive no rating. The colors on the chart don't exactly paint a rainbow, if you know what I mean.

Here is what that chart looks like:

There is one color completely missing from that rainbow - blue. As PFF grades them, the Raiders have no elite players.