Both of these do a fine job of obscuring the contents of letters. A variation of the common confetti pattern for security envelopes. Image by [Dan Schreck] via Abstract Collage Other tints are ...

And some of them actually do a good job of obscuring the contents inside, even if you hold the envelope up to the light. But have you ever taken the time to appreciate the beauty of security ...

thoughtfully crafted letters can provide crucial emotional support and help preserve relationships during separation.