So I try to put this in $rgb($hex_(2E2E2E)).
This doesn't work. How would I do this? I haven't figured it out yet.
The hex_ alias is returning 3 strings separated by comma, but $rgb is parsing this
single return "A" as
one parameter - and one parameter is insufficient: $rgb(A,).
Just add evaluation brackets: $rgb(
[ $hex_(2E2E2E)
] )
The effect is explained more clear
here in short form by qwerty, refering to
jaytea's comprehensive article 
