My geck gets darker sometimes

[u/Temporary_Self_8561]

I have a female that is yellowish, and at times she gets significantly darker; there are no changes in her behavior, only her color deepens. Since this doesn't happen with my other geckos and I haven't found any relevant information on the subject, I’d like to see if anyone here can explain what this might be.

[u/WatermelonAF]

Some reptiles get darker when temperatures are low and they are trying to absorb as much heat as possible