Okay, I was a longish time K9 user and in every else it failed it had the possibility to display account name on the accounts list in whatever color used to. I this isn't an issue for users with under 7 accounts but the more you have them it's easier to assign a color to each for example: you have two business accounts you decide to make one dark grey and the other light grey. Account for your ex is black and your current pink. That makes navigation easier no matter in what order the accounts are on the list.
Just my few cents
