Fanola no orange

My friends had highlights and lowlights done (not by me) her highlight is a nice clean blonde but she thinks her low light is too warm, it's probably a level 7. If she used fanola no orange would this cool it down? I've only ever used the no yellow so no experience with it. Would she have to pick out the low lights and apply it just to them so it doesn't affect the blonde? She's already tried osmo super silver but obviously only took to the blonde and has probably made the low light look even more warm again her ash blonde. Thanks for any advice