Color is secondary to type in the Orloffs. Spangled Orloffs tend to molt out into different degrees of white and black markings. At this point, color is more subjective. Very few birds here have good quality spangling, it is something we are working towards. Orloffs are not a quick maturing breed and take time to reach their peak color, so judging color before they have reached a year is not the best idea. IMO, for ashandvine's birds I would go with "mahogany" and "eagle" and I like the looks of the top 4 pics of desertmarcy's birds, the 6th may also feather out well, 5th has I believe to much white and 7th not enough spangled pattern. I must also mention that the term mahogany is used to describe a particular color variety of Orloff that has no spangling according to its description, it is allowed to have mottled flecks of black to a small degree. And it is accepted practice to breed light to dark in effort to work toward good spangled birds.
As far as standards go, there isn't one in existence for Large Fowl Orloffs in the US. Mr. Casper has sent copies of a translated German standard to everyone he has info for, which includes anyone on this board that has given me email addresses. I also sent out an email with a copy of the UK standard to everyone I have emails for. If you didn't get one or both of these, please let me know.
NC Sprout, your eyes and mine are seeing alike. If you read the comments I made above the photos of my pullets, that is exactly what I said--the 5th one has too much white and 7th not enough spangling. I personally like the looks of ones that are mixed with more white, so I keep them for layers and eye candy, not for breeders. I think we are using the term mahogany to describe the background color of the bird, not as a variety description. I think I need to take good photos of each of my pullets so I can compare when they molt.