Thank you Jolt. I don't want all the bling-bling colour on the rim, because that's the whole thing, it has enough colour on the frame and handle bar. But just the plain black I find you only see the big tires. So a fine stripe or something that would be just a fine-added touch would be good. It's too find the right tone to use that is harder.

Too little and it will be boring, too much it will take away from the frame.

And then maybe when I see my bike with the coloured bar tape on (we brought it to bike shop this morning for them to put on) I'll be satisfied with just black. Could be simply just a single thin white line like the one on a wheel of this bike. The pic is right beside the colour chart.
http://www.indiprint.co.uk/rim-trimz-15426-p.asp#