liked and not so well-liked colors, we're looking at rooms that combine blue, the most popular color in the world , and yellow, the least popular. The rooms we found have colors ranging from the bright and bold to soft and subtle. Do you like combining yellow and blue? Shown in the Images: 1. Soft blue wall and yellow sofa in this living room from Livingetc 2. Bright yellow chair against a dark blue wall from Canadian House & Home 3. Bright yellow shower with blue exterior from Livingetc 4. Yellow headboard in blue room from Better Homes and Gardens 5. Light blue and yellow in this airy room from House Beautiful MORE BLUE AND YELLOW INSPIRATION ON APARTMENT THERAPY: • Color Combo: Blue and Yellow • Color Combo: Blue and Yellow (Part II) Images: As credited above.