In the the first SW movie Obi-Wan’s clothing is reflective of the sort of clothing people wear in the desert, and it wasn’t until RotJ that George Lucas decided that this is the the traditional vestments of a Jedi as evidenced by the ghost of a redeemed Anakin, but frankly this creates problems.

If Obi-Wan is supposed to be hiding from the Empire, then why would he be wearing the very robes that would give him away as a Jedi? Take Caleb/Kanan, who’s dressed in regular clothing which allows him to pass unnoticed. Also, from a tactical perspective, the standard Jedi garments would be impractical to wear in combat, as the hooded long coat and loose fitting robes can easily snag and get tangled up. If anything, Luke’s RotJ tight-fitting black suit is a lot more practical and battle-ready. IMO the traditional vestments of the Jedi should have been used strictly for ceremonial purposes.

Finally a minor nitpick. Is there some sort of unwritten rule that Jedi robes can only come in earthy colours of browns and beiges?