Stylesheets in PDF (Prawn)

Hi,

Can we use stylesheet classes inside Pdf reports?

i am trying to change the header_color from b7e3fe to .heading oh the
stylesheet, inside the table

file:heading.pdf.prawn
texts=[""],[""]
  pdf.table texts,
        :headers => [" Heading "],
    :header_color => 'b7e3fe',

file: public/stylesheets/style.css
.heading { font-family: "trebuchet ms", Verdana, Arial, Helvetica,
sans-serif; font-size: 11px; background: #E5E5E5; color: #0D0E0E;
font-weight: bold; padding-left:10px; line-height: 20px;}