Create Blue or Red Colored Boxplots in R using ggplot2

The default color of boxplot area in R using ggplot2 is white but we might want to change that color to something more attracting, for example blue or red. To do this purpose, we can use geom_boxplot function of ggplot2 package with fill argument by passing the color names.

Consider the below data frame −

Example

 Live Demo

set.seed(1321)
v1<-sample(rexp(5,1),20,replace=TRUE) v2<-sample(runif(5,1,2),20,replace=TRUE) v3<-sample(rnorm(4,0.95,0.04),20,replace=TRUE)
grp<-rep(LETTERS[1:4],each=5) df<-data.frame(v1,v2,v3,grp)
df

Output

v1 v2 v3 grp
1 0.08498376 1.649463 0.9609699 A
2 5.33122341 1.846499 1.0190320 A
3 0.50680731 1.823257 1.0190320 A
4 0.50680731 1.076741 0.9439942 A
5 5.33122341 1.823257 0.9609699 A
6 0.08498376 1.463174 0.9439942 B
7 0.01242698 1.463174 0.9609699 B
8 0.14391411 1.649463 0.9609699 B
9 0.14391411 1.823257 0.9846460 B
10 0.50680731 1.846499 0.9846460 B
11 5.33122341 1.823257 1.0190320 C
12 0.14391411 1.846499 0.9846460 C
13 0.08498376 1.076741 0.9846460 C
14 5.33122341 1.076741 0.9609699 C
15 0.01242698 1.649463 1.0190320 C
16 0.08498376 1.649463 0.9609699 D
17 0.14391411 1.823257 0.9609699 D
18 0.14391411 1.076741 1.0190320 D
19 0.50680731 1.823257 1.0190320 D
20 0.01242698 1.846499 1.0190320 D

Creating boxplot for v1 based on grp −

ggplot(df,aes(grp,v1))+geom_boxplot()

Creating boxplot for v1 based on grp with blue color filled inside the boxplots −

ggplot(df,aes(grp,v1))+geom_boxplot(fill="blue")

Creating boxplot for v1 based on grp with red color filled inside the boxplots −

Example

ggplot(df,aes(grp,v1))+geom_boxplot(fill="red")

Output