In a previous article, "Morgans" said:
The color of a sign does not really matter. The darkness and size of the
letters (and the contrast) does matter. I'm guessing that my bosses told
the EAA that fact, so they deep six'ed the colors. Just a guess. G

I would think that coloured signs are a bad idea - the reduced contrast
would make them hard to read, and there is too much variation in what
people consider the right color - ie if it specifies "red", some people
are going to have an orangey-red and some are going to have a yellowey-red
and so on.

I also note that the designations that the RST signs have are not in
keeping with the NOTAM. Instead of "GAC", he says to write "N-40 Camping"
or something like that. According to NOTAM, it was "GAC" in 2003, the
last time I came, and it's "GAC" now, so did that change in the interim
and change back, or was that a mistake by the RST signs?

--
Paul Tomblin http://xcski.com/blogs/pt/
Every program has two purposes -- one for which it was written and
another for which it wasn't.