Question for Paint/Body Experts

[Seadweller]

I had a 1/2" scratch on my rear bumper that went completely through the paint and into the black poly material. Got the Porsche factory touch-up paint and performed what should have been a near perfect touch-up job. The problem is, the touch-up paint once sanded/buffed out is not Ocean Jade Metallic, but rather silver.

It's odd...When the touch-up paint is applied, it's the proper color match. When I'm done with the repair, the paint ends up silver. I've done it three times with identical results. Twice by sanding the area, and once with the Lanka system.

Any idea why it's changing color like this?