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Syntactic Confectionery Delight

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Hi, thanks, I took a look at Color::Calc and some old code by Ho-Sheng Hsiao dated 1998-07-07 and came up with the following which seems to work pretty well...
# given a colour in the form "#ff00ff" i.e. hex rrggbb, return a contr +asting colour sub contrast_colour { my $col = shift; # Need rgb values for colour... if ( not $col =~ /^#(..)(..)(..)$/ ) { warn "failed to convert colour '$col' to rgb components\n"; return; } my ( $r, $g, $b ) = ( hex($1), hex($2), hex($3) ); #~ print "RGB= $r, $g, $b\n"; # here's an idea! simple contrast solution... my %oppcolors = ( "00" => "FF", "33" => "FF", "66" => "FF", "99" => "FF", "CC" => "00", "FF" => "00", ); $r = int( $r / 51 ) * 51; $g = int( $g / 51 ) * 51; $b = int( $b / 51 ) * 51; #~ print "RGB rounded = $r, $g, $b\n"; $r = $oppcolors{ sprintf( "%02X", $r ) }; $g = $oppcolors{ sprintf( "%02X", $g ) }; $b = $oppcolors{ sprintf( "%02X", $b ) }; #~ print "RGB inverted = $r, $g, $b\n"; return "#$r$g$b"; }

In reply to Re: Re: Contrasting Colours by msemtd
in thread Contrasting Colours by msemtd

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