The article says "manipulate the light that shines on them that simulates their signature blue look". https://en.wiktionary.org/wiki/simulation https://en.wikti

The article says "manipulate the light that shines on them that simulates their signature blue look". https://en.wiktionary.org/wiki/simulation https://en.wiktionary.org/wiki/simulation meaning number 4, "Assuming an appearance which is feigned, or not true.". I believe what they are trying to communicate (pretty poorly) is that the hairs are not blue as such, but in certain circumstances can manipulate light into the blue-violet spectrum. Think of it this way: a prism isn't any of the rainbow colors, but can manipulate light into such.