Semantic-Org/Semantic-UI — pull request #1533 by montecruiseto (2014-12-30 08:32:56+00:00)
Title: Fix @focusBackground

Intuitively I would expect the focus background to be equal to @background here, which defaults to white.
I would imagine that the behaviour in [this example] (http://semantic-ui.com/elements/input.html#inverted) is incorrect when putting the cursor inside the input field, since the input becomes invisible.