I saw part of this mentioned in another topic (that I can no longer find)
This is the ishihara test for red-green color blind. Other than to let us know which color-blindness test it is, I believe the 5 is just there to throw us off. Ok, so this may let us figure out that we are dealing either with red/green lights or red/green alliances. I'm assuming red and green lights. To me, the circle looks like diamond plate, and the blue looks like some type of rough water. So this means a....diamond in the rough??? OK, I don't know that one; I'm still figuring it out. I'm fairly certain that's what the 5 and circle means however.