Convert R Colors to RGB

Convert any valid R color specification to an RGB matrix.

Usage

colToRGB(col, useAlphaChannel = FALSE)

Arguments

col

vector of valid R colors.

useAlphaChannel

logical indicating whether the alpha channel should be included.

Value

Integer matrix with rows corresponding to RGB (and optionally alpha) channels.

See also

grDevices::col2rgb, color-conversion-overview

Examples

rgbToCol(matrix(c(162,42,42), nrow=3))
#> [1] "brown"

rgbToLong(matrix(c(162,42,42), nrow=3))
#> [1] 2763426

colToRGB("peachpuff")
#>       [,1]
#> red    255
#> green  218
#> blue   185
colToRGB(c(blu = "royalblue", reddish = "tomato")) # names kept
#>       blu reddish
#> red    65     255
#> green 105      99
#> blue  225      71

colToRGB(1:8)
#>       [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8]
#> red      0  223   97   34   40  205  245  158
#> green    0   83  208  151  226   11  199  158
#> blue     0  107   79  230  229  188   16  158