*.msc
\\ # leading backslash
[\\\"n] # escaped character
"
"
\%{escaped-character}
black
blue
green
indigo
violet
orange
red
yellow
white
[ar]?box
-x
x-
label
url
id
idurl
linecolou?r
textcolou?r
textbgcolou?r
arclinecolou?r
arctextcolou?r
arctextbgcolou?r
arcskip
hscale
arcgradient
width
msc