When designing maps, choose similar colors to represent similar things, and different colors to represent different things. This video shows an example of employing this technique in ArcGIS Pro. Follow along with the map: https://www.arcgis.com/home/item.html?id=1d64e0d983dc4861b3276c9602dab43c Find the data at Halifax Open Data: https://catalogue-hrm.opendata.arcgis.com/