First up, this OLC, which is pretty self-explanatory, I think. I stamped the sentiment twice: once after inking "laughing" in pomegranite while masking the rest in post-it notes, and once after inking the rest in wasabi while masking "laughing." Turned out pretty cool, don't you think!
stamps: PTI, Hero Arts
cardstock: PTI kraft, SU pomegranite
ink: wasabi and pomegranite
accessories: flower and circle punches
The next card is hopelessly simple. I love the 3x3 grid for cards, and this practically made itself.
stamps: Trendy Trees
cardstock: PTI kraft, SU pretty in pink and chocolate chip
ink: chocolate chip
accessories: circle punches, ribbon, dimensionals
Here is my card that sort of meets the requirements of CAS18, but I love it so much I don't care if it's not exactly right. It uses three shades of pink, and kraft paper, but no other color (unless you want to count white as a color, which I generally don't).
stamps: Papertrey Beautiful Blooms, Floral Frenzy
cardstock: Papertrey white and kraft
inks: pomegranite, rose red, pretty in pink
accessories: circle punches, corner rounder, ribbon