Silhouette of a Wildflower Bouquet on Dark Cardstock

Above: this greeting card cover was created with spray paint and my 6"x6" stencil Silhouette of a Wildflower Bouquet.

Because this deep bronze "metallic" cardstock (JamPaper.com) is very dark, I lined the inside of the card with lightweight paper, cut to fit.  

Above is what the inside of my cards looks like, after the light paper is added.

Other artists would probably skip that step and, instead, use white markers or pens to fill out the inside of these greeting cards.  

Check with the Postal Service before mailing 6"x6" greeting cards -- there is a non-machinable surcharge for sending mail of these dimensions.