+
+
+
Calculates the best contrast text color for a given background color.
+
+
+
+
Usage
+
contrast_text(
+ background,
+ light_text = "white",
+ dark_text = "black",
+ threshold = 0.5,
+ method = "perceived_2"
+)
+
+
+
+
Arguments
+
- background
+A hex/named color value that represents the background.
+
+
+- light_text
+A hex/named color value that represents the light text color.
+
+
+- dark_text
+A hex/named color value that represents the dark text color.
+
+
+- threshold
+A numeric value between 0 and 1 that is used to determine
+the luminance threshold of the background color for text color.
+
+
+- method
+A character string that specifies the method for calculating
+the luminance. Three different methods are available:
+c("relative","perceived","perceived_2")
+
+
+
+
Value
+
+
+
A character string that contains the best contrast text color.
+
+
+
Details
+
This function aids in deciding the font color to print on a given background.
+The function is based on the example provided by teppo:
+https://stackoverflow.com/a/66669838/21019325.
+The different methods provided are based on the methods outlined in the
+StackOverflow thread: https://stackoverflow.com/questions/596216/formula-to-determine-perceived-brightness-of-rgb-color
+
+
+
+
Examples
+
contrast_text(c("#F2F2F2", "blue"))
+#> [1] "black" "white"
+
+contrast_text(c("#F2F2F2", "blue"), method="relative")
+#> [1] "black" "white"
+
+
+