The new radium torches are always tinted yellow, no matter what dye you put into them. Dyeing them white only makes them slightly dimmer (because that makes sense) and in no way reduces their yellowness.
However, I think all of this debating is rather pointless.
If the objective is to have a gray stone in the desert with yellow torches, then start with what looks gray under those conditions and work backward to what the color needs to be for those results. That is what this topic is actually asking for.