Blue robot?  Oh, you must be noticing the red and blue "fill" lights I used in the comparison render.  All three meshes as different artirts' interpretation of the "Lost in Space" Robot.  While there are some variations, surely they are recognizable as the same automaton.

The only time I recall blue ever being used for the LiS Robot was with the vintage Remco brand toy of the 1960s.  My toy had blue legs and arms and a red torso and tread box.  But the actual prop/costume was never painted like that.

Sincerely,

Bill

Tempt the Hand of Fate and it'll give you the "finger"!