library("mxmaps")

data("df_mxstate_2020")
df_mxstate_2020$value = df_mxstate_2020$afromexican / df_mxstate_2020$pop * 100
mxhexbin_choropleth(df_mxstate_2020, num_colors = 1,
                    title = "Percentage of the population that identifies as Afro-Mexican",
                    legend = "%")

Text Shadow

You can use label_color if you want the state abbreviations in a different color than the default black, and you can also add a shadow_color if you want to the state abbreviation labels to have a shadow to better distinguish them from the background colors.

library("viridis")
library("scales")

df_mxstate_2020$value = df_mxstate_2020$afromexican / df_mxstate_2020$pop 
# Will show a warning, look at the municipio examples to see how to remove it
mxhexbin_choropleth(df_mxstate_2020, 
                    num_colors = 1,
                    label_color = "white",
                    shadow_color = "black",
                    title = "Percentage of the population that identifies as Afro-Mexican",
                    legend = "%",
                    label_size = 3.8) +
  scale_fill_viridis("percentage", labels = percent)