What type does static auto constexpr t = {"red", "black", "green"}; derive to?

So I was messing around with some code and I decided that I wanted some sort of list of strings... so then I thought - I can't be bothered to figure out what types to use and so on, so I would just whack it into an auto variable, like this:

static auto constexpr t = {"red", "black", "green"};

and the code compiled. Great, so since this:

static auto constexpr str = "green";

derives to a char[] I was assuming that {"red", "black", "green"} might be a *char[] or some such, thus I could write:

std::cout << "value 1 is: " << t[1] << std::endl;

Which gives me the error:

main.cpp:18:56: error: no match for ‘operator[]’ (operand types are ‘const std::initializer_list’ and ‘int’)

So I presume the type is "initializer_list"? Is there a way I can do somthing like: t[1] to get at the string "black" (assuming index starts at 0)?