Custom overlap colour?

[zx8754]

Can we set custom colour for overlapping sections, currently it is blending the colours of two sets, in below example sets are red and green, so the overlap colour is orange. Can we set it to be, for example, black?

# R version 4.0.2
# eulerr_6.1.0
library(eulerr) 

fit <- euler(c("A" = 1, "B" =  10, "A&B" = 5))
plot(fit, fills = list(fill = c("red", "green")), legend = list(side = "right"))

Related SO post:

• Wrong colors for Venn diagram when the area of one circle is 0

[zx8754]

Oh, looks like it is possible to give colours to overlaps, from the example in the Vignette:

• A Gallery of Euler and Venn Diagrams: Two sets intersecting inside a third
  

[zx8754]

@jolars regarding linked SO post, I understand why it is happening, I tried to explain with my answer, looks like OP is not happy.

You might want to explain it better. Question has a bounty, now :)