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Colors

Source: vignettes/colors.Rmd
colors.Rmd

Palettes

The package provides color and fill scales to match the Cardea color palette. There is a palette called “Multicolor” that uses all of Cardea’s colors.

There are also additional palettes.

Yellows

Reds

Greens

Teals

Browns

Greys

Color and fill scales

Discrete scales

You can use the scale_fill_cardea_discrete() function to change the fill on a plot.

penguins %>% 
  group_by(island) %>% 
  summarize(avg_bill_length = mean(bill_length_mm, na.rm = TRUE)) %>% 
  ggplot(aes(x = island, y = avg_bill_length,
             fill = island)) +
  geom_col() +
  scale_fill_cardea_discrete()

The scale_fill_cardea_discrete() uses the Multicolor palette by default but you can use any of the above palettes.

penguins %>% 
  group_by(island) %>% 
  summarize(avg_bill_length = mean(bill_length_mm, na.rm = TRUE)) %>% 
  ggplot(aes(x = island, y = avg_bill_length,
             fill = island)) +
  geom_col() +
  scale_fill_cardea_discrete(palette = "Teals")

You can also reverse the order by using the reverse argument.

penguins %>% 
  group_by(island) %>% 
  summarize(avg_bill_length = mean(bill_length_mm, na.rm = TRUE)) %>% 
  ggplot(aes(x = island, y = avg_bill_length,
             fill = island)) +
  geom_col() +
  scale_fill_cardea_discrete(reverse = TRUE)

Need more control? There is a cardea_colors() function that you can use with scale_fill_manual() to select individual colors. You can choose from:

  • Yellow, Light Yellow, Light Yellow #1, Light Yellow #2, Light Yellow #3
  • Red, Light Red, Light Red #1, Light Red #2, Light Red #3
  • Green, Light Green, Light Green #1, Light Green #2, Light Green #3
  • Teal, Light Teal, Light Teal #1, Light Teal #2, Light Teal #3
  • Brown, Light Brown, Light Brown #1, Light Brown #2, Light Brown #3
  • Grey, Light Grey, Light Grey #1, Light Grey #2, Light Grey #3
penguins %>% 
  group_by(island) %>% 
  summarize(avg_bill_length = mean(bill_length_mm, na.rm = TRUE)) %>% 
  ggplot(aes(x = island, y = avg_bill_length,
             fill = island)) +
  geom_col() +
  scale_fill_manual(values = cardea_colors("Yellow", "Red", "Teal"))

Continuous scales

You can also use the scale_color_cardea_continuous() and scale_fill_cardea_continuous() functions for numeric variables.

penguins %>% 
  ggplot(aes(x = bill_length_mm, y = bill_depth_mm,
             color = bill_depth_mm)) +
  geom_point() +
  scale_color_cardea_continuous(palette = "Teals")