yeah, the bulkheads are definately blue. The rainbowten pictures are in black and white. The blue looks a bit paler than the blue on the standard bulkheads. I still think they would look better in gunmetal.
TA04- it also depends on it's condition, just cause you've had it 3 months doesn't mean it's in good condition. I know this from buying second hand cars.
Chris@weaponR- i gear around 6.8 for 19T but it really could be different for you depending on track size etc.