Bright white and deep red. The sliced apple has a bold and striking appearance. How could you not want one or two in your zentangles?
I also wanted to show off the cool ATC sized tangle cards I got from Sandra Bartholomew's zazzle site. They were on sale for half price (not sure the sale is still on, sorry).
They're an excellent quality--a slick surface that allows a sharp, crisp line. The steps boxes are a little small for complicated patterns. She has a larger size available for tangles like that.
I love 'em. I've already used up about 40 of them!