Yes, I believe you are right about that. I don't speak french so I usually refer to the yellow as "day-glow yellow ( or day-glow green for the more greenish offering ) There is also a "day-glow orange" that is also highly visible but rarely is it offered as a cycling specific color. Just a couple weeks ago I picked up one of these day-glow orange sleeveless T-shirts at the local Walmart. Cheap as all get out. Should work out well once the weather gets a little warmer. Yeah, orange is kind of "geek-ugly" but what the hey. It will get me seen. At my age I don't care so much about the geek factor. Shame it is that "bike specific" clothing has gone up so much in price. If you can find a decent "high-visibility" jersey under $50 you are really lucky.