If you have different visor shades, post them here for others to see. I just ordered the classic Fibremetal "Dark Green" visor that TK409 used (around $5) AND a Fibremetal "Shade 5.0" visor (around $18) from RJSafety.com. The "Dark Green" is a LOT greener and more transparent than the Shade 5.0. I was not sure whether the "Dark Green" was closer to Shade 5 or Shade 3, so I bought it to find out. I took photos of each with the flash on.
Less direct flash, capturing both visors (Shade 5.0 on right)
Direct flash, Dark Green visor
Direct flash, Shade 5.0 visor
The "Dark Green" is obviously green, even with a dark surface behind it. There has to be nearly zero light transmission behind it for it to appear black. Even then, when hit with a direct flash, it's transparent and appears green. When pressed against your face, the transparency of that is better than the Shade 5.0 - acting more like a tinted toy lens and less like sunglasses. This appears to be more like a "Shade 3.0".
The Shade 5.0 appears black unless there is light on the other side of it, in which case it appears a dark green. It has a darker tint, kind of like some dark sunglasses, when pressed against your face.
My recommendation: splurge on the extra $$ if you have to and get the Shade 5.0.