Mail won't get overlooked when it arrives in these boldly colored envelopes. Grab your clients, family, and friends' attention with these envelopes. Great for holiday cards, greeting cards, invitations, announcements, letters, personal mail and direct mail. To seal simply apply water to edges of flap and stick. colored envelopes can be the perfect way to compliment your brand, accent your invitation, We offer a wide variety of colored envelopes in many popular business and invitation envelopes.