It's Michelle's choice.
I've used the Katzelkraft stamps (Les Pingouins), And I stamped it with Gina K amalgam ink. the sentiment is from Joy Crafts (6410/0469) and I stamped that with Versafine Clair ink.
I chose the penguin as it really doesn't need colouring and it's holding a cup of something warm, I see coffee ;-). But I added some colour anyway with my markers, fully realizing it might seep through the card base to the inside. But I didn't want to leave it all B&W.
The shading under the penguin is so faint, I don't think it shows up on the photo.
For more information, or to play along the AAA Cards Challenge, see this.