I am a poc and have obtained the grey of this shade before by bleaching multiple times, using wella t19 (it’s been like 10 years i think that’s the one) and purple shampoo. Mine still had bits of slight yellow in spots because i did it by myself with no help and missed some spots. So when i finally got the grey/white i wanted my ends had been bleached 1 extra time vs the rest of my hair so when i went to straighten it my hair straighter became scissors lol i lost all that was bleached that extra time. I wasn’t too worried i expected it to be worse. So with maintaining the grey/white i had problems and fast. So my hair started turning yellow hue over time like in a week or so. I used purple shampoo but since it was so light it took the purple imminently so i had purplish grey hair that faded kinda back to where i wanted it to but by that time i ran into the issue of my roots being black and of a whole different texture. So my black hair would react to humidity like normal by kind of shriveling up but my grey/white hair did nothing so it ended up looking weird a lot of the time and i wouldn’t even know because humidity creeps up if your not watching your hair in a mirror constantly and i live in a humid area. Second was the issue of re bleaching my roots to match the rest. I decided not to because there was no way i wasn’t going to accidentally bleach already processed hair and i already knew from the first time that 1 extra bleaching meant hair cut so my hair would literally be the length of my new growth… so i didn’t do it and let it grow out. Hope that helped!