$mylovelydata= {
       'Colour'=>'blue',
        'Entries'=> {
                'Flowers'=>  {
                           'Dahlia'=>{'Smell'=>'nice',},
                           'Rose'=>{'Colour'=>'red'},
                  }
         },
};

##</code><code>##

  my $colour;
  if defined($data->{'Entries'}->{'Flowers'}->$flower->{'Colour'})
 {$colour=$data->{'Entries'}->{'Flowers'}->$flower->{'Colour'};};
  if defined($data->{'Entries'}->{'Colour'}) 
{$colour=$data->{'Entries'}->{'Colour'};};
  if defined($data->{'Colour'}) {$colour=$data->{'Colour'};};