Stripes

A young nihon tokage - Japanese skink - Plestiodon japonicus showing off its stripes and vivid blue tail. 

nihon tokage - Japanese skink - Plestiodon japonicus

While it is not the best camouflage, the stripes and the bright colour at the end conspire to cause predators to strike behind a moving skink's current position - either missing the target entirely or hitting the tail which the skink can detach in a life or death situation.