#315 Generate lane colours on a HSB ring, much brighter and more saturated than the Solarized scheme
#315 Tone down the drop-shadow on ref labels

They still look a lot better than the solid outline, especially on Retina; so I’m hoping this helps with the visual weighting of the readability problem.
#315 lighter colours for ref labels
Merge remote-tracking branch 'refs/remotes/origin/master'