How many shades of grey?

Almost overnight, it seems, every woman I know has gone blonde. The blondes are even blonder; mousey-heads, redheads, raven-haired, brunettes, all of them are now a uniform blonde. Well, almost all of them. There are a few brave eco-friendlies refusing to get out the dye-bottle, but even some of those au-naturels have given in after [...]