When Orion's window is inactive the toolbar elements become greyed out and darken, this is true for all of them except for those inside of the address bar.
(Orion's toolbar while the window is active)
(Orion's toolbar while the window is inactive)
I propose the same behavior of the other toolbar elements is also applied to address bar elements for consistency's sake.
Note: this can also be observed in the favicon icon when the address bar is selected when clicking away from Orion's window.