Is it currently possible to make the labels generated with ggforce::geom_mark_ellipse(label=)
colored?
In the example below, I'd like to see versicolor typeface in green:
Yes, but not in a straightforward way like you would with any other mapped aesthetics. You would have to build a new layer where you change the colour and filter the layers correctly. You can see this becoming quite laborious if you have 10+ groups each needing their own label colour.
library(ggplot2)
library(ggforce)
ggplot(iris, aes(Petal.Length, Petal.Width)) +
geom_mark_ellipse(aes(fill = Species, label = Species,
filter = Species != 'versicolor')) +
geom_mark_ellipse(aes(fill = Species, label = Species,
filter = Species == 'versicolor'),
label.colour = "green") +
geom_point()