Shading Boxes in Fan Chart

[DeniseL]

I would like to print a fan chart with customized shading to use with DNA research. I see where I can change universal shading by generation, but how can I change individual fan cells? I am trying to recreate something like these charts designed by Blaine Bettinger:

http://www.thegeneticgenealogist.com/2008/12/21/unlocking-the-genealogical-secrets-of-the-x-chromosome/

Thanks.