Missing Ldraw Colors

[Sven v. Beuningen]

If you look at parts images here http://brickset.com/colours/family-Metal you see that there is probably more color discrepancy between parts that are supposed to be the same color than between these three different color bins. So I'm OK to map them to the same LDraw color, and use RGB of metallic silver  (current color) - though "RGB" here means little!!!

Good overview. From my point of view our three canditates look very similar. Because these are photos, the lighting conditions could be different when the photos where taken.
The other ones from the link are easier to distinguish.

So Long

Sven