If I use a toner or Jazzing for a cool not warm look, what color or number would that be?

It would depend on the color charts for diferent products. There are no industry standards for levels or tones in hair color products. In general for hair coloring cool tones are reflected by an A for Ash, B for Blue, V for Violet. G usually denotes a Gold tone or Warm, RO is normally a Red-Orange. RR can mean a cool red... which is more of a Red Violet or it could be indicated as RV. W can mean Warm. D can mean Drab, which is usually Green, Green can also be shown as N for Neutral. Different products have different codes... it's really hard to say.If I use a toner or Jazzing for a cool not warm look, what color or number would that be?
There's so many kinds. You have to go look at the right one for you