darken user avatar backgrounds, to avoid having white on white, fixes #1552
darken user avatar backgrounds, to avoid having white on white, fixes #1552

kobotoolbox/kpi,kobotoolbox/kpi,kobotoolbox/kpi,onaio/kpi,onaio/kpi,onaio/kpi,kobotoolbox/kpi,kobotoolbox/kpi,onaio/kpi