I have no facts to back this up but it stands to reason you are more visible wearing retina burning outfits over black leather. The observations above seem to confirm this. Bright or white helmets are regarded as being an important aid to being seen. Something to do with being the highest point on you.
Be careful over the eye contact thing. Common advice is to ignore it. People can look straight at you but are in fact looking past you. You think they have seen you, you relax your guard and then bang, “Sorry mate, I didn’t see you” (google smidsy). Part of the problem is you have a small horizontal profile and you are moving directly towards them so you are not moving across their horizontal field of view. Our eyes&brain are wired to pick up movement so they literally do not see you despite looking straight at you. A quick weave in your lane can help them see you as you are now moving across their horizontal field of view. I read somewhere that advanced car driving classes have you roll forward at an intersection to force this movement.
Also, camouflage works by breaking up the outline of an object so you want an anti-camouflage jacket. In some ways a black leather jacket would be better on a sunny day than a jacket with many colors and stripes.
Lots of things to consider. I’m all for being more visible but at the end of the day you should still ride as if you are invisible.