A Leucistic axolotl is not Albino. The root word “leuko” just means “white.” It’s a totally different primary gene. Leucistic is probably the most specific overall phenotype. As explained in the Axolotl.org page, they are Leucistic because the d/d genotype prevents the dark pigment from migrating across the body when the embryo develops. They are white or pink, yet they have black (or sometimes blue) eyes. A Leucistic will always have a d/d genotype, and it also must be either A/A or A/a (non-Albino). 
Leucism is caused by a mutation that results in fewer melanocytes being produced in the skin. Because melanocytes produce melanin, a dark pigment, axolotls with this mutation do not have the same patterns as the Wild-type morph. 
No history yet
Black spots or freckles in their head and back, giving it a dirty. The spots may increase or decrease with time. If you keep it in clean water with no or less predators, the spots will start to disappear. The freckles or dots help them maintain a camouflage to remain safe against threats.
Dirty Lucy’s have red or pink gills, and dark brown or black eyes
The body is white with black flecks.
No known proven lines
No known related traits