Lynch is correct sfmmman2001, he could only get four colour in the logo/graphic. Unfortunately, if youlook at the graphic, it is five colors. He had to "remove" one of the colors and use the shirt's "background" as the fifth color.
With the logo's layout, the yellow is the only Color (with the exception of red) that does not touch the outer border of the shirt.
If Jeff was to do two different shirt colors (use a red shirt for the "background"), he would have had to pay more for getting a second transfer created and that would have translated into a higher per shirt cost for us.
-------------
"It's Deja Vu all over again." - Yogi Berra