Help on GT3 997.1 black blue wheel colour

[The Sage]

Having had my car 7 years a stupid mistake saw me lightly kerb my black wheel.
The wheels are on a 2007 car and when viewed in the sun have a metallic finish with a very small blue fleck. I took it to a highly recommended wheel refurbish company who said they have no idea what the colour is and they repair quite a few Porsche wheels.

Is this a factory colour or have the wheels been painted at some point?
Any help welcome.

[The Sage]

Have found out car was originally supplied with silver wheels so have been repainted at some point. Can anyone advise what paint colour is for original black and silver colours are called. Need to get all 4 repainted!