The palette based on Flat UI colors (https://www.materialui.co/flatuicolors).
palette_flat(palette = "contrast", reverse = FALSE, ...)Character name of palette. Can be "full", "ice", "rainbow", "complement", or "contrast".
Boolean indicating whether the palette should be reversed.
Additional arguments to pass to colorRampPalette().
This function is usually not called directly, but from within
scale_color_flat().