How do you refer to an item that you already mentioned in a previous example?

This is a bit hard to explain so here's an example:

Colors are interesting. They stimulate organisms in inexplicable ways. Like, why does red infuriate bulls? Or why does blue tranquilize humans? And that's not all. To us a single color can represent different emotions, sometimes contrasting ones. [I want to announce I'm using blue as an example again] it relates to trust and serenity, but also to coldness, sadness, and lack of emotion.

What word/phrase is the most appropriate?

Solution 1:

For example, the aforementioned colour blue can also...

Where aforementioned might be a good word to use.

Solution 2:

I would rearrange the sentences to give blue the center stage toward the end:

Colors are interesting. They stimulate organisms in inexplicable ways. A single color can represent different emotions to us, sometimes contrasting ones. Red infuriates bulls. Blue tranquilizes humans [...]