I love my Kona cotton colour card. It incorporates colour and texture ... and the promise of a new quilted project!
I decided to buy a colour card was a worthwhile investment as I've only seen limited Kona (or similar quality cotton fabric) colour ranges locally and they were NZ$22 per metre! I've found places I can order them from in the US for approx US$5.50 per yard (the exchange rate is NZ$1 to approx US$0.79). Postage isn't cheap but it is worth it if you can get the colour right. So that is why I got a colour card. But it was fiddly to work with so when I found this I thought I could do the same. So out came a large sheet of cardboard and a heap of velcro.
It is so much easier to work with now... and I can pick out a range of colours that I would have had trouble identifying earlier. See the range at the top right - they go with Bonnie and Camille's 'Happy-Go-Lucky'.
I do recommend writing the number of every colour underneath the velcro on the cardboard so that if a card falls off you can put it back on the right place. I also scanned a copy of it before I cut it up - so have that to check the order if need be. Mine also folds up so I can store it easier. Probably good advice too to say - keep away from preschoolers - or at least watch them with eagle eyes while they look at the colours.
Another link - I found this when trying to match Aurifil thread to Kona cotton. How handy - someone has done the work for me and it is so much easier when ordering online.