Some are not aware that temperature actually plays a significant role in the brightness of a leopard geckos colors. It has been shown that geckos incubated at lower temperatures will be darker than those incubated at higher temperatures. This offers breeders the ability to determine the intensity of the colors of their offspring.
Since geckos incubated at lower temperatures are typically darker compared to their counterparts incubated at higher temperatures, it goes to reason that males are typically brighter than females. This has changed over the years however as the knowledge of temperature effects on color has made its rounds.
so lower temps means less colour = darker so not as bright i have played with hot females cool females everything in between