3. Pastel Color-Blocked Waves Soft pastel gradients bring a calming, dreamy atmosphere to any windowsill or nursery. Divide your pot into organic, wavy sections using painter’s tape or freehand brushstrokes. Paint each section in complementary pastel shades such as dusty rose, sage green, buttery yellow, and lavender. This cheerful, lighthearted aesthetic looks exceptional when paired with textured greenery like silver dust or baby rubber plants.