Convert c to a hex color.
numpy.ma.masked
If False, use the #rrggbb format, otherwise use #rrggbbaa.
#rrggbb or #rrggbbaa hex color string
© 2012–2023 Matplotlib Development Team. All rights reserved.
Licensed under the Matplotlib License Agreement.
https://matplotlib.org/stable/api/_as_gen/matplotlib.colors.to_hex.html