Mine's Brixton Blue Metallic (no metallic to be seen), I guess that's Holborn?
I really like it. For my tastes (not necessarily yours), orange was too orange, red looks too much like Mazda red, Hunter Green (Racing Green) looks great, but I distrust matte finishes - they mark too easily. And that's it for
colours. The rest are just shades of grey. Seriously dark grey (black) to seriously light grey (white). Bleuugh. Black really showed the dirt after a ten minute drive, and white looks like a boring fleet car. Unless there's no choice I won't buy any road colour grey/silver. Too boring.
Blue was bit lairy, but not too lairy, and sets off the orange caliper covers nicely (unlike red). My first choice, and in the end, my only choice

- colours were running out the dealer's doors due to MG's huge sale.