Color

Double blue

Reference information

Name	Double blue
Genotype	a/a d/d rb/rb
Mandatory picture?	No
Frequency (all time)	0.33 % (163 rats)
Frequency (in the last 2 years)	0.27 % (5 rats)
Average lifespan (all causes)	18.8 months (♀: 19.6 months – ♂: 18.4 months)

Description

Black + American blue + Russian blue.

Also known internationally as Russian silver.