Colore change GTP question

[Ballpython2]

When GTPs go through a color change is it so they don't become prey? or is it something in their genes that by default make them change color?

[singingtothewheat]

Here is the best info I could find in a quick search. The reason for color change is not really understood but anyway, thought this might help.

http://www.finegtps.com/color_genetics.php