How to make UIImage background color transparent?

I used ironon transfer paper for a dark fabric,the background is still white.can i make it color?

• Further description: I printed a picture and words onto the paper (using wilton brand and their image site). The background remained white eventhough I selected a navy shirt on their website. I figured the white background would disappear into the shirt. WRONG! It did darken, but you can still really tell it's there. Do I need to cut out each individual letter and all the little "openings" in the picture? How can I fill in the background with color? This seems way too complicated. I guess that's what I get for trying to be creative! Thanks, Diane

• Answer:

  Snip snip is best. You can however get a black or navy fabric marker and start filling in the 'blanks'. A combination of the two will work wonders in your case.