American Blue Agouti, once called Opal, is a lighter, golder shade of Agouti with a slate blue tone to it. The guard hairs will be a dark blue, and the undercoat a light grey. The underbelly is also light grey. The skin should be blue-grey and the entire color should be even and clear. Since there are no reddening recessives at work here, the eyes will be clear black.

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Self-evidently, this is an Agouti rat with a double-recessive of American Blue. This is the Agouti version of American Blue.

AFRMA

"Color to be medium slate at the base of the hair with a yellow-tan band on top. Coat is evenly ticked with blue guard hairs. Belly color will be silver blue. Eye color is black."

RSA

"Color: An attractive blend of mid-blue ticking over a medium fawn ground. Undercolor to be blue down to the skin. Belly color silver. Feet dove gray. Ears and tail to be covered with blue hairs. Fault: Brown tinge. Eye Color: Black."

RatsPacNW

"Medium to light slate blue with with a tan tip hair shaft, guard hairs will be dark.  Eyes black."

URS

"Color is to be a medium slate overall with a pale gray undercoat and dark blue guard hairs. Hairs to be evenly ticked with bands of mid-blue and yellow-tan. Belly and feet to be silver gray. Eye color to be black."