thank you for your friendly and positive words, dear friend.
Good question raised by you - really interesting to find out how the bright blue colour is produced. It is even found in some primates like baboons, and I suppose the blue is not a pigment by itself but rather a matter of structures in transparent layers - such as tiny blisters of air. Would like to do further investigation on that.
With thanks and best regards,
Lacerta viridis. (72) *