Colornote unfortunately doesn't allow you to export your data in any way (aside from exporting each note one by one). So if you aren't using it, don't start now. If you were and want to switch to a ...
Decryption logic is adapted from fcoiffie/decode-ColorNote. The script skips the first 28 bytes of the backup file, decrypts the remaining bytes with AES-CBC, then skips the first 16 bytes of the ...