w/r/t https://github.com/jenkinsci/jenkins/pull/5065

I appreciate all of the new icons, but the new weather icons are significantly more difficult to differentiate at a glance than the old weather icons, since they're all the same color.  Apart from fixing all of our builds (who's got time for that), would it be possible to add some color variation (preferred), or at least have an option to re-enable the old icons?  Maybe make the sun yellow again and the clouds light gray?

Example: