Unfortunately I do not have pics of the SkyCarbolite I mentioned. It was like this, but with blue bits allover.
A red/black metallic in the front triangle and a ti rear. The bike looked both expressive and classy. Imo aesthetisly still one of the most pleasing bikes I've ever owned.
Another red/blue bike I would like to own:
3D Racing Rover by Chris Herting!
I think in many cases blue bits on red frame don't work out great. Though I do not think it is an absolute fact red can't go with blue. Exceptions excist ...and can be even more interesting because it isn't the obvious/logical choice.
Also don't forget our nations flags are in red & blue Turns out great, right.
I have an arrest me red Buck, and have now built it with plenty of blue Ringle - s'pin, stem, hset, skewers etc.
I REALLY am not sure. It KIND of works, but I am not 100%. Thinking of going black instead. Red/black deffo looks good.