frillback colors

I just got my first 4 Frillbacks and was wondering if you all could help me understand the colors. Is there a good article about them somewhere? My main questions are: 1) What colors do they come in? 2) Can you breed the different colors together, or should pairs be separated by color? 3)...

Dear pigeon fancier Red Frill Back Hen was imported from Ksa in 2009. it has big size and soft fathers hope you like it http://pigeon-photos.blogspot.com/2010/10/red-frikkback-pigeon.html Best Regards Mahmoud

would love to know what color my frills r and any info u can give me on the colors they should throw. thanks!! silkie alexandrite- female topaz her mate malacite- left and his mate onyx right and this is cocoa and pebbles a younger pair who r just starting calls but haven't become mated...