did i made a mistake or is just can't change color?

[boxyld]

the input i typed
fastfetch --logo ~/.config/fastfetch/logos/shrek.txt --logo-color-$[1,2]
the output:
Error: usage: --logo-color-2

the txt file if you really care:
shrek.txt

[CarterLi]

fastfetch -l ~/.config/fastfetch/logos/shrek.txt --logo-color-1 red