The text in the URL field when dark mode is enabled is slightly off-white, making it slightly less legible than Safari. It should be completely white to improve legibility and match Safari.
Currently in dark mode an Orion non-private window's URL field text is #E8E8E8, while Safari uses full #FFF white. In an Orion private window the text colour gets slightly darker still to #DADADA (Safari remains #FFF in private and non-private windows). For non-HTTPS websites Orion's broken padlock icon is almost illegible, especially in private windows, failing all accessibility colour contrast standards in either mode.
A full comparison of Orion vs Safari:
