Remember the early prequel comics from Disney Adventures that were to take place before the events of Lilo and Stitch? 

625 is a teal/blueish, obviously things still were being worked out back then for his design. Pretty neat that they kept most of the same look though.

For some reason years later we get what looks like an ’ L&S: the series age’ comic and he is still blue, was that a nod to the old comics? 

to be honest I like this color on him more ;o