Mac Menu Bars
macmenubars.com
macmenubars.com
Cisco's anyconnect is a super bright icon. Tunnelblick is either yellow or the icon looks super washed out and does not work with retina displays. Dropbox defaults to a colorful icon (why!?)
I'm definitely curious if you can switch automatically. It'd be a huge oversight if you couldn't.
Anyway best app to manage the menubar is imho http://www.macbartender.com/ and well worth the price.
I really don't like the approach of some OSX developers to ignore Apples Interface guidelines regarding the menubar, either accidentally or at will, maybe to elevate their apps inside the menubar with colored icons.
All of the above menubar apps are managed by Bartender[4], which allows me to show/hide, hide in bar but show in bartender or totally hide it.
1. https://itunes.apple.com/us/app/the-clock-the-best-world-clo...
Modifying dock icons isn't hard, but it shouldn't be necessary.
My menubar: Flux, Gmail, Twitter, Temperature, Network, Time.
Unfortunately, not all apps support white menu bar icons and thus the result will vary.