How to test grob color?

[Trevor Bača]

Hi,

This tests tuplet bracket thickness (and overrides color):

%%% BEGIN (works) %%%

{
  \once \override TupletBracket.color = #(lambda (grob)
    (if (= 3 (ly:grob-property grob 'thickness)) red))
  \tweak thickness 3
  \times 2/3 { c'2 c'2 c'2 }
}

%%% END %%%


But how to test tuplet bracket color?

%%% BEGIN %%%

% Fails with wrong type argument in position 1: (1.0 0.0 0.0):
{
  \once \override TupletBracket.thickness = #(lambda (grob)
    (if (= red (ly:grob-property grob 'color)) 3))
  \tweak color #red
  \times 2/3 { c'2 c'2 c'2 }
}

% Fails with Wrong type argument in position 1: red:
{
  \once \override TupletBracket.thickness = #(lambda (grob)
    (if (= red (ly:grob-property grob 'color)) 3))
  \tweak color #red
  \times 2/3 { c'2 c'2 c'2 }
}

%%% END %%%

Thanks for any ideas,

Trevor.

-- 
Trevor Bača
www.trevorbaca.com
soundcloud.com/trevorbaca