[refactorColorScale] Better assert messages
[refactorColorScale] Better assert messages

NextTuesday/plottable,iobeam/plottable,alyssaq/plottable,jacqt/plottable,danmane/plottable,danmane/plottable,RobertoMalatesta/plottable,NextTuesday/plottable,iobeam/plottable,palantir/plottable,RobertoMalatesta/plottable,jacqt/plottable,palantir/plottable,palantir/plottable,NextTuesday/plottable,softwords/plottable,iobeam/plottable,RobertoMalatesta/plottable,palantir/plottable,danmane/plottable,softwords/plottable,alyssaq/plottable,alyssaq/plottable,softwords/plottable,jacqt/plottable