Isn't whole JWT infrared since there is generally much more info for astronomers compared to visible-for-human-eye spectrum? Also infrared passes better through cosmic dust and nebulae much better, going back to first sentence.
And since showing infrared picture to folks who can't see in it is less than pointless, they just shift it all into visible to a 'place' on spectrum which makes most sense for given picture. There can be some choosing fancier shades done there for general public but I would be surprised if they completely re-painted original 'shift' just to look more fancy (happy to learn the facts if anybody knows in any case).
And since showing infrared picture to folks who can't see in it is less than pointless, they just shift it all into visible to a 'place' on spectrum which makes most sense for given picture. There can be some choosing fancier shades done there for general public but I would be surprised if they completely re-painted original 'shift' just to look more fancy (happy to learn the facts if anybody knows in any case).