The different coloured logos indicate the different statuses Yoti Password Manager is in:
Not connected: Yoti Password Manager is not linked to a Yoti account.
Connected but locked: Yoti Password Manager is temporarily locked to keep your details secure.
Connected and unlocked: Yoti Password Manager is ready to use.
Logins stored: Yoti Password Manager has logins saved for the website you are on.
Generate a password: Yoti Password Manager wants to generate a strong password for you.