As an artist, I can tell you that my red pencils and paints are not at all the same as any of the "reds" we describe in animals.
Hi! And welcome aboard. You ask a very good question, but unfortunately, I don't think anyone can answer it the way you are hoping. The key phrase,
"As an artist," turned on the proverbial light-bulb.
In most Art, beauty and color are interpretive, but most colors start out uniform. An artist can buy a tube of "Saffron Yellow" and expect it to match the tube he/she has at home. A PrismaColor #931 "Dark Purple" pencil will be the same color no matter where or when you purchase it.
Unfortunately, chicken colors don't work the same way. They don't come with PrismaColor numbers (a dog-gone shame, in my humble opinion!) so the principle doesn't apply to them. If I had to compare them to art projects, I'd have to say that chicken colors are more akin to "dye lots." In most breeds, each hatch (or batch, if you will) should be similar in coloration - that's where the Standard of Perfection, or SOP, comes in. Even that isn't always precise. Just like in dye-lots and paint mixing, colors can be slightly off between batches. And like in dyeing textiles (or firing glazes,) colors can often surprise you. Sometimes you'll get an "ombre" batch ... where each chick is a slightly different color than the others, despite having the same (or very similar) parents. Occasionally, you'll get a throwback that comes off really different from the others, and sometimes they're all so close you can't tell them apart. That's part of the beauty ... and the fun ... of having chickens!
If you decide to show, you'll likely find that even the colors listed in the SOP can be interpreted differently, almost subjectively, by different judges. What one judge sees as a rich mahogany, another may see as "too red-brown." My own birds are mostly Nankin bantams. The hens are supposed to be a "chestnut" color. My girls vary from a golden auburn to a dark palomino coloring - and different judges place them flip-flopped, according to their own interpretation of "chestnut." Have you ever seen two random chestnut horses exactly the same shade? Me neither. It's kinda like that ...
So, I guess what I'm saying is don't stress too much about pinning down a certain color to a certain name. Think of it as having the universal computer-screen caveat, "Colors may appear slightly different due to light and computer hardware differences."
Once you've looked around a bit, you'll get a better feel for what's the "right" color for your birds ... unless you end up with Easter Eggers or Swedish Flowers ... then all bets are off and every hatch is like Christmas ... or maybe more like a bear wandered through your painting supplies ... and that's all good, too!
Sorry this is so long ... I didn't start out to write a pamphlet. It just kinda "happened." I hope it helps ...
And again, welcome to BYC ... it's good to have you here!
). But when a SOP says something like "deep red, not mahogany," it seems like someone, somewhere has drawn a line. I just wanted to get a feel for where that line was. I now understand that the line moves, depending on who is doing the looking.
Before that, it was a NICU for a trio of sick kittens. 
