BIP39 Colors Translates BIP39 Mnemonic To Colors & Vice Versa

"Next will be the manual method so that anyone can easily carry out both conversions using their own calculator so you will be sure of not depending on any tool to recover your original mnemonic," said the project's author.

https://www.nobsbitcoin.com/bip39-colors-translates-bip39-mnemonic-to-colors-vice-versa/