That’s a few pictures of mine.
The colour really does depend on the car itself… Mine are dark anthracite and they really complement the car I feel. But I’m also contemplating having the car wrapped in the distant future so I’m fairly confident that they’ll still look good regardless of what colour I choose for the rest of the car, likely a lime green, electric blue or candy/cherry red.
Take the center caps out in the usual way and when you get them off, you’ll see that the emblems have 3 small push fit tabs that hold them to the cap itself.
Start by pushing them with your thumb… In some cases this will be enough to remove them.
If not (don’t be surprised if they don’t move at all), I found the best way to remove them without damaging them was to hold each cap firmly in the palm of my hand and then with a fairly soft but rigid object (I found the wooden handle of a hammer worked well), push them out.
Ensure the handle of the hammer has made full, even contact with the tab itself (don’t hit them with the hammer) and then push against them. The tabs should slot through the holes in the cap and the emblem will protrude enough that you can just remove it completely.
Don’t rush it, after many years they’re likely to be very brittle and you can easily break them clean off if you’re heavy handed.