I'm trying to setup macros to use across a set of graphs for cmyk colors.

I've tried
local mygray : "45 45 49 8"
local mygray : `"45 45 49 8"''

but for both Stata tells me
"45 45 49 8 not allowed

I had also tried these without the : but then when I used the macros in a bar graph [color(`mygray'), I don't get the color I want which I do get specifying color("45 45 49 8").

What am I missing?