You can't see the entire shade, but the dark bay horses with the brown noses and fawn color by their flanks and elbows is striking to me.
This is pretty much the definition of a brown horse, not bay. I agree with Chiilaa: the pictures you posted are both brown horses. Savanna is a light brown that is very similar to bay.
Actually, both those horses posted by Equilove look brown to me
I have to disagree the first one posted looks like a mahogany bay, and, the second looks like a Standardbred, that type of dark bay is very common among SBs and TBs.
This is pretty much the definition of a brown horse, not bay. I agree with Chiilaa: the pictures you posted are both brown horses. Savanna is a light brown that is very similar to bay.
I guarantee you my horse is bay, and so is the second photo I posted. The second horse has black legs, you can see clearly. It's also fuzzy wuzzy from winter, and that often darkens a dark bay even further which will sometimes make the area where the brown of the body meets the black of the legs blend. I owned a thoroughbred gelding that was a dark bay by registration and looked nearly black in the winter time.
This horse here fits my description about brown noses/flanks, but it's a brown horse because it lacks the black stockings and its mane and tail appear to be dark brown as opposed to black.
Some registrations put "Dark bay/Brown" to describe color and often think of dark bay as brown, but not really the other way around. I wouldn't call the above pictured horse a bay, but that's just me. No one would be wrong to call a dark bay horse a brown horse, because it IS brown, but that doesn't mean it ISN'T bay. Savanna is most definitely a bay. Honestly, I think the most literal version of a brown horse is a liver chestnut.
Brown has been found on the genetic level. It is a form of agouti along with bay and wild bay. Brown horses are lighter around the muzzle and in the elbow and stifle area. They can vary in body shade just like any other color. Brown horses can and do have black points like any other horse with the agouti gene.
ETA a registry is the absolute last place I would turn to for a color definition. 99.9% of them are so far behind on the color genetics it isn't even funny.
Brown has been found on the genetic level. It is a form of agouti along with bay and wild bay. Brown horses are lighter around the muzzle and in the elbow and stifle area. They can vary in body shade just like any other color. Brown horses can and do have black points like any other horse with the agouti gene.
ETA a registry is the absolute last place I would turn to for a color definition. 99.9% of them are so far behind on the color genetics it isn't even funny.
Bays can have lightened hair at the same points browns do. It's called Pangare, and it can cause a dark bay horse to be mistaken for a brown. The horse she posted is a dark bay, not a brown. The horse is a czech Standardbred named 'Kevin Tornado Zlosyn.'
I agree with Chiilaa: the pictures you posted are both brown horses. Savanna is a light brown that is very similar to bay. 
