I made a report system that is displayed to make A4 sheet printing. I put some edges in it to make the impression. The problem is that at the time of printing, it prints everything black. The problem is the bootstrap, because when I shoot it everything is right.
Form
Note: The borders in the code below are # 000 (black) but any color I put does not work
<div class="container" id="all-recibo" style="font-size:12pt;border:2px solid #000;border-radius:10px;margin-top:10px;padding-top:10px;">
<div class="row" style="border-bottom:2px solid #000;margin-bottom:10px;">
<div class="col-md-4" id="logo_recibo">
<img src="<?php echo base_url('assets/images/content/'.$empresa->logo);?>" class="img-responsive">
</div>
<div class="col-md-8 text-center">
<h3 style="color:#BB6B5A">Telefone: <?php echo $empresa->telefone;?></h3>
<h4 style="color:#BB6B5A">Email: <?php echo $empresa->email;?></h4>
<h4><?php echo $empresa->site;?></h4>
</div>
</div>
<div class="row">
<div class="col-md-3"> </div>
<div class="col-md-5 text-center"><h1>Recibo</h1></div>
<div class="col-md-3" style="border:2px solid #000;border-radius:10px;"><h3><strong>R$ <?php echo $recibo->valor;?></strong></h3></div>
<div class="col-md-1"> </div>
</div>
<div class="row">
<div class="col-md-11">Recebi do Sr. (a) <u><?php echo $recibo->cliente;?><?php echo str_repeat(" ", (313 - strlen($recibo->cliente)));?></u></div>
</div>
<br>
<div class="row">
<div class="col-md-11">A importância de <u><?php echo $recibo->extenso;?><?php echo str_repeat(" ", (317 - strlen($recibo->extenso)));?></u></div>
</div>
<br>
<div class="row">
<div class="col-md-11">Referente à <u><?php echo $recibo->servico;?><?php echo str_repeat(" ", (321 - strlen($recibo->servico)));?></u></div>
</div>
<br><br>
<div class="row">
<div class="col-md-6"> </div>
<div class="col-md-3" id="data_recibo">Sorocaba, <u><?php echo date('d/m/Y');?></u></div>
<div class="col-md-6">
<div class="text-center">
____________________________________________
<br>
ASSINATURA
</div>
</div>
<div class="col-md-3" id="condicoes_recibo">
<p>Só aceitamos reclamações dentro de 48 horas</p>
</div>
</div>
</div>