Use 'green' rather than 'lime' for the brightness and contrast tests
Use 'green' rather than 'lime' for the brightness and contrast tests

It turns out that `lime` doesn't change when tweaked with
brightness(125%) or contrast(125%).  We need a darker color, and
'green' actually changes with those filter functions applied.

GNOME/librsvg,GNOME/librsvg,GNOME/librsvg,GNOME/librsvg