The 1869 $1 “Rainbow Note” is one of the most colorful and collectible pieces of U.S. currency. It earned its nickname from the red, blue, and green inks used in its intricate design.

Rainbow Helps Users Slide Into the Crypto Economy CoinDesk Apr. 17, 2023, 06:14 AM ...

Crypto won’t find mass-market adoption until the most basic of apps, the wallet, is easy to use. That’s why Rainbow, with its fun colors and emphasis on user-friendly design, is one of ...