It's not your fault.
I have issues with light colored prints (white, etc.) on bright (red) or dark colored (dark green, black, etc.) ribbon. The underlying color will bleed through (i.e. your black bled through the white and pink dots making them gray. Turn down your oven temp
. I usually starch and bake bows & korkers at 250 degrees for 25 minutes. If I have prints that fall in the above categories (like yours), I starch and bake at 220 degrees for 20 minutes. That fixes the problem. The prints tend to be some kind of vinyl/paint/I don't know what, but baking it at higher temps can cause the decorative print (dot, etc.) to thin, which lets the underlying color show through.
I had the same thing happen to me with some St. Patrick's Day ribbon. It was dark green with little white shamrocks. Starched & baked at normal temps, the little white shamrocks turned pastel green. Lowered the oven temp, starched and baked again, no problems...