One thing which has helped me when working with tables in CGI is start_table and end_table. This might have helped you pick up the problem with quotes which particle has pointed out.

use CGI qw(:standard start_table end_table);

print start_table;
print Tr(td({-height=>'10', width=>'700', bgcolor=>'#BBCCEE'},h5('hi')
+));
print Tr(td({-height=>'10', width=>'700', bgcolor=>'#BBCCEE'},""));
print end_table;
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