My Dad always said by the colour they use in the brochure as its the best colour for the car. Just so happens on 3 out of my 4 cars I've purchased the car in a colour I love and it's also the brochure colour. My E88 was sapphire black but the brochure colour was 'champagne silver' not a colour aimed at their younger target market. More like the colour for the older drivers out there. Put it this way it's a colour my mum and dad like and maybe in 25-30 years I'll like it to?