Here's a close up of the speckles I created and the Friday Sketcher's sketch that I used:

I used my Stampin' Up color sprizter and the same blue marker that I colored the balloon with to add the speckles. Isn't the mouse just darling? And the sketch was really fun to use.
This is my 4th One-Color-Card, so I'm exactly half-way through the basic rainbow. It's definitely going to be an all Penny Black set, but I might start on Whiff of Joy next, since this is so much fun. Have YOU ever tried a One-Color-Card? I'd love to see, even if it's not a new card.
Materials:
Penny Black: "Hugs" clear set
Close-to-my-Heart papers
black brads
Whisper markers
Stampin' Up color spritzer