Check for the given color strings whether they represent gray scale colors. — colors.are.grayscale • fsbrain

Check for the given color strings whether they represent gray scale colors.

Usage

colors.are.grayscale(col_strings, accept_col_names = TRUE)

Arguments

col_strings: vector of RGB(A) color strings, like c("#FFFFFF", ("#FF00FF")).
accept_col_names: logical, whether to accept color names like 'white'. Disables all sanity checks.

Value

logical vector

Examples

colors.are.grayscale(c("#FFFFFF", "#FF00FF"));
#> [1]  TRUE FALSE
all((colors.are.grayscale(c("#FFFFFF00", "#ABABABAB"))));
#> [1] TRUE