This was a last minute purchase for my little grandson's Halloween costume. (I'm so glad I have Prime!) His mom couldn't find matching tights at local Target etc. Admittedly they didn't see much use but they fit perfectly and even held up great during our 2 year old's busy night when he got overly excited and fell a few times during a trick or treat. They are opaque except for the waves, which are more solid. With a larger child, they can stretch enough to be considered transparent. "Waves" added attractiveness to a little duckling's legs. I would call this color less neon than bright yellow.