Vents above driver and passenger

[ZR1 Vette]

Sorry if this has been asked or answered before. I have done a lot of searching and have not found the answer. What are the 2 white vent type round things above the driver and passenger in my truck?

 

[TwoBit]

Tweeters/Speaker

 

[Gsteve]

And…. White ????? Wth????

 

[ZR1 Vette]

I guess they are aluminum but look white. I must be color blind.

 

[Gsteve]

Ahh maybe. Should be Blk !