What is Color Blindess?

• Color blindness is when people can’t distinguish colors
  
• Affects approximately 8% of population of men, 0.5% of women
  
• Issues distinguishing red & green is most common

Color Brewer Online

https://colorbrewer2.org

RColorBrewer Package

display.brewer.all(n,type,colorblindFriendly)

Input:

• n - number of colors you want
• type - type of data (qual for qualitative,seq for sequential,or div for diverging)
• colorblindFriendly - TRUE or FALSE (set TRUE to return color blind friendly colors)

Output:

• Visual representation of available colors. Each set has a name, which can be called in code.

display.brewer.all(n=4,type='div',colorblindFriendly=TRUE)

brewer.pal(n,name)
Input:

• n - number of colors you want
• name - name of color palette, which can be found using display.brewer.all()

Output:

• Hex color codes

brewer.pal(3,"Dark2")

## [1] "#1B9E77" "#D95F02" "#7570B3"

display.brewer.all(n=NULL,type='qual', colorblindFriendly=TRUE)

ggplot(painters, aes(x=School, fill=School)) + 
  geom_bar() +
  ggtitle("Count of Famous Painters that Attended Each School") +
  theme(plot.title = element_text(hjust = 0.5)) +
  scale_fill_brewer(palette="Dark2")

display.brewer.all(n=NULL,type='seq',colorblindFriendly=TRUE)

ggplot(diamonds, aes(x=carat, y=price, color=cut)) +
  geom_point() +
  ggtitle("Diamond Quality - Size, Cut, Price") +
  theme(plot.title = element_text(hjust = 0.5)) +
  scale_color_brewer(palette='YlOrRd')