In What Ways Can You Decorate the Room with Happy Birthday Alphabet Balloons? Pastel shades on the happy birthday letter balloons are the most-happening choice right now! These balloons can light up the mood immediately with the soft touch of soothing colours like purple, green, blue, etc. For more information read this: https://nboxoffice.com/in-what-ways-can-you-decorate-the-room-with-happy-birthday-alphabet-balloons/