Lavender Crested Geckos
A Lavender is a crested gecko with a black base and hypo. This hypo pales the dark base to grey with a blue or purple cast. The animal still fires up. If an animal shows barely any change between states, it is showing stronger hypo rather than a different morph.
About the Lavender gene
Lavender is not a single gene but a base colour. Because hypo cuts back its melanin, a black base crested gecko turns grey with a purple or blue cast. Keepers buy it for the cool ground colour that sits under a light pattern.
Appearance
The base is light grey when fired down. When it fires up, the colour darkens just a bit and the purple or blue tint appears. Different animals show shades ranging from pale grey through purple and lavender to sky blue, which is the rarest, and some have a greenish cast. A true Lavender still fires. The more strongly its hypo is expressing, the less an animal shifts between states, so a gecko that barely changes is showing stronger hypo, not a separate morph. The pattern is usually white and cream, and most young animals that hatch with orange in the pattern turn white as they grow. Lavender sits under other patterns too, and phantom lines produce animals that are lavender-grey as well.
Genetics
Lavender is a polygenic trait made from a combination of Black Base and Hypo. You can reach it through several breeding routes. It is also called Black Base Hypo. You will see it listed as Lavender and as Pos Lavender. There is no recorded first year or originator.