I have two green lenses, and they each do have a slightly different tint.

It's stated at the bottom of the page that there is manufacturing variance.

Also, the color definition of your PC monitor may not exactly match the color definition of my digital camera.

Ambient light hue also significantly alters perceptions of color.

I cannot account for all of those variables. In fact, sitting here on my desk playing, the color of my player seems slightly different than what's pictured on the PC monitor. It's close, but not exactly.

I won't be using a colorimeter any time soon, so don't ask.