BlackBerry added two new indicators in the BlackBerry OS 10.2 beta that I am really digging. First is a simple rule set that will highlight “priority” emails based on a simple ruleset like conversations you started or having the same last name as you or simply having the Important flag set. Priority emails get a slight red line to the right of the email as an indicator.
The Account Colors is actually a feature I appreciate more and has been improved from legacy BlackBerry devices. It allows you to set a color indicator to the left of every email in the hub that indicates which email address received it. Since I have 4 email addresses this is a godsend! Sadly there are only six color options but hopefully more are coming. The ones offered are pretty high contrast. You can set this option by going into the hub, hitting the menu button, selection settings, scrolling down and selecting email account, and then clicking on an email account and changing the color.