A couple of ideas come to mind.
1) Put either brightly coloured or uniquely coloured license plate frames on your license plates. Something like a bright red or green. Not black or white.
2) Put a flag (or something like it) on the frontside of your review mirror. My wife did that for our White Minivan (Lots of white minivans. LOL.) When we'd go to pick up our kids from some sort of activity, every white van that approached, they'd have to check to see if it was us. LOL. But the bright red flag on the mirror really helped to quickly know it was us.
3) Get one of those soccer flags that you stick in the side window. When you park somewhere and you think it'll be hard to your car, just stick the soccer flag in your window.
My sister just got a 2019 Rogue and it's dark grey, so she is trying to figure out ways to find her car as well.
For me, our old 1st gen Rogue is that light blue colour. It seems to be kinda rare around here, so not so hard to find our Rogue in the parking lot. But . . . it also seems that I can't find touch up paint for my Rogue either (in Canada.) Canadian Tire doesn't list our colour for the Rogue. And when I go on-line, it seems that the only places I can order that colour are in the States. If I remember correctly, the colour code of our Rogue is FAF.