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It is generally recommended that you don't use more than 5-7 shades of colors in a choropleth map, and that's for non-colorblind audiences. I might suggest that you take a hybrid approach- use colorblind-safe shades as shown in the references you used, and also use differences in hatch, symbols, etc, to further differentiate features. And yes, the KISS solution is usually the best. From: Northeast Arc Users Group [mailto:[log in to unmask]] On Behalf Of Adam Kurowski Sent: Wednesday, May 11, 2016 12:33 PM To: [log in to unmask] Subject: color blind friendly mapping The Project: To replace a black and white, paper zoning map that is designed with hatch, line, and marker symbols with a colored version made with GIS that easy to keep updated. The Problem: One of the main staff members who will use the map is color blind. The map would require 10+ colors and the color blind friendly color ramps, can't handle that many variations in relation to this person's type of color blind. I have looked at many resources<https://blogs.esri.com/esri/arcgis/2011/02/23/color-tools-for-map-makers/> and they have helped, but the number of zones and overlays still make the map hard to distinguish for the color blind person. I would love to make one all-inclusive product, but that may not be possible. The Questions: 1. Does any have experience or advice to help make this municipal zoning map color blind friendly? 2. Can anyone offer a creative solution, simple or high-tech, that could help this one staff member access the zoning information in another manner? 2a. Is that an acceptable alternative and is it maintainable? 3. Should I follow the KISS rules and just convert the map to GIS and stick with a black and white hatch, line, symbol map? Thanks! I'll compile and share the results. Adam ------------------- Adam Kurowski, Systems Analyst / Director of GIS Town of Arlington 730 Massachusetts Ave Arlington, MA 02476 phone: 781-316-3385 email: [log in to unmask]<mailto:[log in to unmask]> ------------------------------------------------------------------------- This list (NEARC-L) is an unmoderated discussion list for all NEARC Users. If you no longer wish to receive e-mail from this list, you can remove yourself by going to http://s.uconn.edu/nearcsubscribe. ------------------------------------------------------------------------- This list (NEARC-L) is an unmoderated discussion list for all NEARC Users. If you no longer wish to receive e-mail from this list, you can remove yourself by going to http://s.uconn.edu/nearcsubscribe.