different egg shades of color

[enola]

Several times I have seen people refer to brown eggs as a certain number on the color scale.

Where do I find this 'color scale' for shades of brown ??

 

[jenjscott]

Here's one on ebay
http://cgi.ebay.com/Marans-Egg-Colo...photoQQcmdZViewItemQQ_trksidZp1713.m153.l1262

 

[Krys109uk]

I think they're probably referring to shades of Marans eggs.

Here is the website.

http://marans-club.club.fr/echllang.htm#echelle