How to tell dark bay from dark brown

Thanks

It probably started as a regional thing, but genetically they are not bay per say. Brown still shows up under agouti, but is a different gene then bay. I suck at trying to explain it! Lol

Thanks for trying, I know nothing about genetics, but I have never heard of a brown horse before.

I guess I viewed it as my dark bay being described by none horse people as black.

So would the only way to tell is if I got her tested? I'm not planning on breeding her ever and it doesn't really matter. I was just wondering.

Here are some pictures that show her colour.

No, with you mare it is pretty apparent. Look at her muzzle. See the lightening around it and see how she is lighter around her stifle area and her elbows? Those are indicators that she is brown. There are quite a few horses where it is just hard to tell. I feel pretty confident saying your mare is brown though.

So wait..Lola has a really light muzzle..But she definitely looks bay..

She is a brown as well.

Isn't it just a different form of Agouti? I thought it was notated as A,t where the t would be super-scripted. Or something like that.

It is a form of Agouti. Bay (A), wild bay (A+) and browns (At) are all forms of agouti.

That's what I thought.

I suppose I'm like AlexS. I'd never heard anyone call a horse "brown" until recently. I just see them as varying shades of bay. I mean I always knew there was a very slight genetic difference but technically isn't a "brown" still a type of bay?