>>8074134You're thinking too small. If they designed it to be yellow, they could set the final battle elsewhere. Or even if it HAD to be set in the desert, none of the bots are real obviously, the artists could easily dirty up or darken the yellow to give it some contrast. This isn't that hard.
And no, not every construction vehicle is yellow, but the vast majority are. It's a safety thing, yellow and black says "caution." Other colors like red and orange do too, and sometimes they are used, but yellow is the most common.
