An output for the 2FA fee (to trustedcoin) is highlighed blue.
Overall, there are 3 colors:
Green highlighted: "Sending address" from own electrum wallet
Yellow highlighted: "Change address" from own electrum wallet
Blue highlighed: Address to buy 2FA credits from TrustedCoin
Not highlighted: Address which does not belong to the own walllet / or TrustedCoin to top up the 2FA credit.