sRGB color patch for Emacs 24 on Mac OS X. More info: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=8402

emacs24-osx-srgb.diff

diff --git a/src/nsterm.m b/src/nsterm.m
index af1f21a..696dbdc 100644
--- a/src/nsterm.m
+++ b/src/nsterm.m
@@ -1389,7 +1389,7 @@ ns_get_color (const char *name, NSColor **col)
 
   if (r >= 0.0)
     {
-      *col = [NSColor colorWithCalibratedRed: r green: g blue: b alpha: 1.0];
+      *col = [NSColor colorWithDeviceRed: r green: g blue: b alpha: 1.0];
       UNBLOCK_INPUT;
       return 0;
     }

I was the original reporter of the color bug referenced above.

Although I'd seen patches like yours, I worked up a fresh patch which explicitly uses sRGB for all Emacs' colors, and I'd be interested in any feedback you might have: https://gist.github.com/3858136

Oh, note also that there are suggestions that "DeviceRed" colors are essentially treated as sRGB colors in Mountain Lion...