Every year on their birthday, twins Marley and Riley receive a mysterious, hand-painted letter from their great aunt Lucy, containing a riddle. On their tenth birthday, they solve the riddle and find a magical paintbrush inside a secret compartment of the letter.
With a single brushstroke, they’re whisked away into Colorland, a vibrant world brimming with talking animals, magical rivers, and floating islands, each a different shade of the rainbow. However, they find out that an evil color thief, Obsidian, has stolen and hidden all the primary colors – red, blue, and yellow, thus causing Colorland to lose its vividness.
Marley and Riley embark on a thrilling quest to retrieve the primary colors. Along their journey, they encounter colorful challenges and puzzles that require teamwork, bravery, and a little bit of color theory to solve. They receive help from the friendly creatures of Colorland, each giving them a clue about the hidden locations of the colors.
After navigating through the blueberry blizzards, crossing the sunflower yellow meadows, and outrunning the scarlet foxes, they finally restore all the primary colors. The siblings outwit Obsidian and lock him up, restoring Colorland to its former glory.
On returning home, they realize it was all a dream, or was it? Because from that day forward, Marley and Riley could see colors just a little brighter than everyone else. Their adventures in Colorland taught them the importance of unity, courage, and the beauty of diversity.