See the specific color names from one existing palette in ggplot 2

Question

I am looking to see the color name from set1 palette. I need to use number 4 and 5 on my graph, that are the violet and orange one. I don't know their code. Please point me to where I could find their name or code. Thanks a lot.

The set1 I am mentioning is here:

https://learnr.wordpress.com/2009/04/15/ggplot2-qualitative-colour-palettes/

Thanks so much for any suggestion

Answer 1

You can find out the code by ggplot_build.

# fake data
df <- data.frame(x=1:8, y=1, col=letters[1:8])

# Construct the plot
g <- ggplot(df, aes(x=x, y=y, color=col)) + geom_point(size=5) +
  scale_color_brewer(palette="Set1")

g

# Retrieve the color
colors <- ggplot_build(g)$data[[1]]$colour

# Double check
plot(df$x, df$y, col=colors, pch=20, cex=5)

# color 4 and 5
colors[4:5]
[1] "#984EA3" "#FF7F00"