1960s(?) Sci-fi movie about a caped man called the 'Prince of the Universe'

1960s(?) Sci-fi movie about a caped man called the 'Prince of the Universe'

OK about 40 years ago I remember seeing a movie on TV about a man who either referred to himself or was called the Prince of the Universe no relation to highlander. I dont have many details to give other than if memory serves he was dressed all in white or possibly silver, with a cape, and I believe his suit also had some kind of antennae on its hood. The only scene I can remember was him fighting a bunch of bad guys in some kind of underground complex possibly caverns. Im reasonably sure it was filmed during the late sixties as it was in color. I know this isnt a bunch to go on but I figured Id take a shot and ask.

This is Prince of Space from 1959. Not in colour, but all the other features match. You may be getting confused because the box cover is in colour andor because the film was featured on Mystery Science Theatre 3000 with interstitial segments in colour, obviously parodying the film.