How to check the rgb color looks like?

General
1

Is there a function that can be used to display a rgb color?

Assuming a rgb color was created like this:
library(grDevices)
test<- rgb(red=100, green=125, blue20, max=225)

How can I check the real color looks like so that can adjust the parameter for red, green and blue?

2

I'm not familiar with an existing function, but you could create one that plots one point with the created color.

library(grDevices)

show_color = function(i) {
  plot(10, 
       col = i, 
       pch = 19, cex = 20,
       xlab = '', ylab = '', 
       xaxt = 'n', yaxt = 'n', 
       bty = 'n')
}

test1 <- rgb(red=100, green=125, blue=20, max=225)
test2 <- rgb(red=105, green=88, blue=30, max=125)

show_color(test1)

image
image316×266 1.89 KB

show_color(test2)

image
image302×248 1.84 KB

Created on 2023-04-17 with reprex v2.0.2

3

Thank you so much!
Great function!

4

in case you want to compare how well several colours work together or even check multiple palettes of colours the pal.bands function from the pals package is great:

pals::pal.bands(c(rgb(red=100, green=125, blue=20, max=225),
                  rgb(red=105, green=88, blue=30, max=125)) )

# or define the palette first
test1 = rgb(red=100, green=125, blue=20, max=225)
test2 = rgb(red=105, green=88, blue=30, max=125)
palette = c(test2, test1)

pals::pal.bands(palette)
5

This is really cool! Thank you!