Looking forward to seeing your entries!
https://www.backyardchickens.com/threads/13th-annual-byc-easter-hatch-along%E2%80%94natural-egg-photo-contest.1513847/
I think they were from these chicks:
https://web.archive.org/web/20161103025854/http://www.mypetchicken.com/catalog/Chick-Packs-trade-/Chick-Pack-trade-Intense-Egg-Color-Assortment-p2105.aspx