They look the same as any other white gouges for W124, unless other manufacturers use some special reflective ink or materials. I dont have a pic. of them in my car but this is what it looks like:
http://www.geocities.com/nsx1164/pictures/93ce-driver-800w.jpg
At night they are stil white. My dad said that he would be annoyed by this, but I like it. If you can work in a "Black" light somehow, you will get the "Indiglow" gouges

but that is a matter of taste.
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Dmitry
90' 300CE
17" Lorinsers RS90
Brulen mufler
Clear Blinkers
White gouges(made my own)