QQQQ has a very limited number of red and blues.

I got one red 2015 St. Patrick's Day and on Blue 2015 January "Diamonds".

Mirage has blue caps. The new blue cap "Kani Kapila" is in play. I got one of those and a colorized "Walter".

Venetian/Palazzo has Silver strikes and a few red/blue caps

I didn't make it out to Sam's Town this trip.