It appears that gray is the new black ....
I'm using a lot a grey because it goes with everything. Last month I went into my LQS and bought 3 full bolts of light and medium grey (hope no one else wanted those colours that week because that was all the shop had).
Two 40% discount vouchers on purchases on what was left on bolts was an added incentive.
The bolts were untouched so they were real bargains.