try and re-introduce stepped colors, WIP; work on #336
try and re-introduce stepped colors, WIP; work on #336

raymond91125/amigo,raymond91125/amigo,geneontology/amigo,geneontology/amigo,raymond91125/amigo,geneontology/amigo,raymond91125/amigo,geneontology/amigo,raymond91125/amigo,geneontology/amigo,geneontology/amigo,geneontology/amigo,raymond91125/amigo