I would say yellow is spot on. Yellow lenses just give really good clarity, hence the use by drivers.
I always wear brown lens sunglasses to play in, as brown does the same in daylight.
Its like going from watching a standard movie on TV to then watching it in HD.
"Tennis is just chess with balls."
Sometimes: Dunlop Biomimetic 300 - Sometimes: Prince Exo3 Graphite 93