I work for a group that creates hub sites containing dozens of dashboards. In order for these dashboards to have stylistic continuity, we spend a lot of time going through maps and manually changing the color of each choropleth and categorical polygon feature to match our other maps'.
It would save our group a lot of time and energy if we were able to save and access custom color schemes in ArcGIS Online -- perhaps through Map Viewer's Ramp window or, what I think is a better idea, through enabling Style items containing color schemes to be published to AGOL.
