Blue Trophies

I'm curious, but what do the blue trophies represent when competing in a game?

In this regard, OmegaKnuckles raises an interesting point.

OmegaKnuckles :

the blue trophies

But platinum is not a blue metal, it's greyish-white. These trophies are like crystal trophies, right ?

Yes, but why call it "platinum" in this case?

Delgan :

Yes, but why call it "platinum" in this case?

Because when grey is taken by silver, platinum use all times the blue