There are few things more adorable than a first birthday party. It's a chance for parents to celebrate (and show off) their beautiful baby, reminisce on a year of many firsts, and shower their child with love and affection. Plus, it's a great excuse for a big party filled with treats! If you're looking for inspiration for a first birthday party theme, you may want to consider rainbows. The color scheme is surprisingly versatile (you can choose between pastels or brights!), and additions like clouds, unicorns, hot air balloons, and more can really bring the theme to life. Keep reading for 17 rainbow party ideas that will make the day as special as your little one!