G'day glenn,
Predefining default options is a good idea.
Your problem here is that your using a hashref instead of a hash: you want %{$colors{lbl}}, not $colors{lbl}.
Also, if you put your defaults first, you can override them if you want to. E.g.
$frame->LabEntry(
%{$colors{lbl}},
-other_opt => 'other_value',
-background => 'non_default_colour'
);
By the way, your "PS: i have also tried: ..." is wrong for all sorts of reasons.
Use strict and warnings in all your scripts to pick up errors like this:
$ perl -Mstrict -Mwarnings -e '
my %colours = ( lbl => { "-background => tan, -foreground => black
+", } );
'
Odd number of elements in anonymous hash at -e line 2.
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