Here are my before & afters of the Wella T10 Toner. The first was done on yellow hair, and the second on orange. Neither of these photos have been edited, so you can see the true results that I achieved with the toner.
WELLA T10 TONER ON BLEACHED OR YELLOW HAIR
You'll see in the first photo above, that the Wella T10 Toner is designed for hair this light - it added silvery tones to the bleached hair, toned down the yellow but left some natural warmth. Sometimes silver tones in blonde hair can look flat and dull because it's too ashy - the Wella T10 Toner doesn't!
WELLA T10 TONER ON ORANGE HAIR
The second photo above shows the Wella T10 Toner on orange hair. While the toner did slightly darken the hair, it really does not have much of an effect on hair this shade. I wouldn't recommend it for orange hair.
WELLA T10 TONER ON GREY HAIR
I would recommend the Wella T10 Toner on grey hair! Using this toner on natural grey will add back some natural, light blonde tones. It will pick up on your white strands and give them a white shimmery look.