Jody can answer this more in depth if she comes along since she raises all three breeds and she can correct me if I misstep here. Slate is the only proper color for an Ameraucana's legs. That said, naturally there are true Ameraucanas who are breeder culls, who for some reason do not quite meet the standard on some level, even though they are the true breed. Your bird does not look like one of the colors in the Ameraucana Standard; that plus the off color legs could mean that she is an Easter Egger. Her eyes appear to be the proper reddish bay color, though.
Here is some information on breed standards and below a pic of one of the ones I hatched showing the leg color:
AMERAUCANA LARGE FOWL
Ameraucana large fowl are in the APA All Other Standard Breeds (AOSB) class of chickens. They were admitted to the Standard in 1984. Ameraucana is a general purpose fowl and has a distinctive blue eggshell coloration. Disqualifications include presence of ear tuffs and absence of beard & muffs.
STANDARD WEIGHTS for LARGE FOWL
Cock
6½ lbs. Hen
.5½ lbs.
Cockerel
.5½ lbs. Pullet
..4½ lbs.
AMERAUCANA VARIETIES (Large Fowl & Bantam)
Black, Blue, Blue Wheaten, Brown Red, Buff, Silver, Wheaten & White
AMERAUCANA SHAPE (Large Fowl & Bantam Males)
COMB: Pea.
BEAK: Curved.
FACE: Nearly hidden by muffs.
EYES: Expressive.
WATTLES: Small, preferably absent.
EARLOBES: Small.
MUFFS AND BEARD: Full, well-rounded, medium length.
HEAD: Medium size.
NECK: Well-arched.
HACKLE: Full.
BACK: Medium length.
SADDLE: Medium in length.
TAIL: Well spread, medium length, carried at 45º above horizontal.
WINGS: Fairly large, tips carried above the hock joint.
BREAST: Prominent.
BODY AND STEARN: Body of medium length, stern well-tucked up.
LEGS AND TOES: Medium length set apart, four toes
AMERAUCANA SHAPE (Large Fowl & Bantam Females)
COMB: Pea.
BEAK: Curved.
FACE: Nearly hidden by muffs.
EYES: Expressive.
WATTLES: Small, preferably absent.
EARLOBES: Small.
MUFFS AND BEARD: Full, well-rounded, medium length.
HEAD: Medium size.
NECK: Medium length.
HACKLE: Full.
BACK: Medium length.
CUSHION: Moderate.
TAIL: Medium length, well spread, carried at 40º angle above horizontal.
WINGS: Fairly prominent, carried above the hock joint.
BREAST: Full.
BODY AND STEARN: Full but trim, fluff well-tucked up.
LEGS AND TOES: Medium length, four toes.