The symbolRenderingMode modifier changes the system image icon rendering mode. This can be changed to monochrome, hierarchical, multicolor or palette. 

The foregroundStyle modifier can be used to change the colors used for the icon. Monochrome uses the primary color. Hierarchical uses shades of primary color. Multicolor uses colors independent of the foreground style (colors depend on the icon design). Palette uses both the primary and secondary color to style to icon.