I'll give guessing their genders a go but you've got to promise me that you will repost at 3 weeks of age so I can see if I was right.
Yellow - cockerel
Brown- cockerel ......... not 100% sure on this
Green- pullet
Blue - pullet
Orange- pullet DEFINITELY
Purple- cockerel
I breed my Coppers for the faster feathering females and slower feathering males, it's a very nice way to accurately sex them at approx. 3 days old. I have been breeding them this way for almost 5 years and have great luck with it.
I do sell hatching eggs when I have them and have filled my waiting lists. Recently, over the last year due to the price of feed, I downsized my flocks of over 150 large fowl to 4 males and 6 females and that includes both varieties of Marans, Birchen and Copper. If and when the Birchens ever start laying I will only be working on borrowing blue from my coppers to make the Blue Birchen. I will only have some eggs from my coppers available this year and that will be way later this year.
The Birchens are new little project for me so I think that I will be holding on to their eggs for a while or until I reach a point in my project that I feel confident in letting them go.