I love the flexibility of the tricolor series. 8 speed, 7 speed, brifters, DT shifters. Single pivot brakes, dual pivot brakes. Aero brake levers or non aero brake levers. They can all be found in the 6400 series. And unlike the 7410 series, the 6400 is compatible with other Shimano groupsets too.
Recently though I did something heretical- I paired Claris R2000 brifters with a 600 tricolor groupset. I figure the Claris brifters being grey in color, would match the grey 600 series. But as it turns out, the Claris is quite a bit darker:
On the bike they look almost black unfortunately:
