Nah, it isn't really all that bad - or, more precisely, it doesn't look all that bad to my (color-deficient) eyes, anyway.
It does look a little strange, though - it is clearly mid-day, whereas the light looks somewhat early morning-ish. Good thing I was using a yellow, not an orange filter. I assume things would have looked worse, then.
Mostly, I am just annoyed with myself for not thinking in the first place.
Perhaps I should take Andrew's cue and make a habit of it, then call it 'art'.