r - How do I change the polygon fill color and border color for SpatialPolygons objects? - Geographic Information Systems Stack Exchange

I have SpatialPolygons or SpatialPolygonsDataFrames which I'd like to plot. How do I change the color using the three plotting systems in R (base graphics, lattice graphics, and ggplot2)? Example

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geopandas - Colorizing polygons based on color values in dataframe column? - Geographic Information Systems Stack Exchange

Change both border and fill colors in one place in QGIS 3.0 - Geographic Information Systems Stack Exchange

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r - ggplot2 - how to fill nested polygons with colour? - Stack Overflow

r - How do I change the polygon fill color and border color for SpatialPolygons objects? - Geographic Information Systems Stack Exchange

qgis - Attaching data to SpatialPolygonsDataFrame - Geographic Information Systems Stack Exchange

ggplot2 - How to draw and fill polygons from a SpatialPolygonsDataFrame with R plotly - Stack Overflow

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