bwerb:Would it make any difference if I told you my secondary is yellow...(for the first few feet anyway).
Actually, I think it is the primary that would be more important to be bright, consider this, you are using lights, and typically a lot of light, so it should remain yellow to quite a depth.
Also, on a seven foot hose, it would be much easier to find if dropped. Remember, in an OOA situation, you'll still be breathing fine, it's your buddy who is gonna be trying to snag that thing out of the water.