Issue with initializer list for vector of an enum class

I have an enum, and a couple of vectors of some of the contents of the enum. I want to change the enum to an enum class, for type safety, but I'm getting errors. Consider the following snippet: ``` #include <vector> enum Colour { red, green, blue }; int main() { const std::vector<Colour> something { red, green }; return 0; } ``` It works fine. However, if I change the enum to an enum class, I get errors such as `error: ‘green’ was not declared in this scope`. What can I do?