In Firefox settings, you have the ability to change the color of the default text and background color.
And the password suggestions seems to use the default text color, but the background color isn’t changed according to the default background color. Is there a way to manually change either one of the colors that Kee is using? / Could allow custom theming via the Kee settings in a future release?
Here’s a demonstration of what trying to use Kee to log in currently looks like to me: