In reply to Nick Smith - UKC:
When it's gloomy outside, a nice, bright tent is good for the mood. However.... Do you want to be subtle with where you're camping? Not just from the point of view of camping somewhere where you might not be allowed, but also, do you want your tent to be an eyesore for other people? Maybe not a concern for you on the North Lees campsite, but if you take it wild camping, it might be.
Alternatively, if you want to take it somewhere really serious (himilayas, for example) then bright red or orange might be good from a safety point of view.
Apart from that, a light tent can mean that you wake up earlier - I once slept in a yellow tent, and it was really bright inside from about 5am onwards. No good for a lie-in/hangover!
Bright tents also attract more bugs. Again, this might not be a problem, depending on where you plan on camping, but it might also mean you have a thicker cloud of midges in some places.
For what it's worth, my current one is olive on the outside, with a bright orange inner tent. It seems like a fairly reasonable compromise. I actually heard somewhere that the first force 10 tents were designed orange, so it gave a more amorous hue on the inside.... oo-er!
Tim