Yesterday I bought a box of L’Oreal Superior Preference Noir Fatal hair colour in a deep plum colour (NF03). It was essentially a black colour that was supposed to show highlights of dark purple.
Here’s a photo after I dyed my hair. Can you tell the difference?
There isn’t really much difference. It was a darker colour on my hair so it coloured my lighter ends. However the shine ended up being more red than purple. My hunt for a purple highlight colour continues!
Tiana Feng 
Noir Fatal suppose to be a blue tone black colour, not too sure where the purple shine came from, possibly from the combination or the black hair and hair dye.
I know tjis is old but if you are still looking I have advice.
I’ve used this for years with no problems and get the same colour on the box. My hair is black-brown.
I have 3 suggestions:
1) if all your dyes are going reddish, get your water tested for iron. You may need an iron filter added. One place I lived, my husband’s medium brown hair looked naturally purple from the iron in our water. Try washing with a shampoo that rinses mineral deposts the nigtlht before you dye.
2) You may have too much product in your hair. This is why shampoos recommend washing twice. Again, wash 12-24 hrs before, don’t use products. Hide under a hair wrap for a day lol.
3) This brand is recommended to use actual shampoo to wash out. It takes 2-3 washes to go from black to purple.
Keep in mind, under florescent and artificial lighting, it will look more black. I wore this as a pharmacy technician and never got in shit for it.
Under daylight bulbs and natural light, if you follow the tip above it will be purple.
I always dye root to tip regardless of touchups, new dye or old dye with this product. I also recommend 2 boxes for your hair length if its anywhere as thick as my own. Start box one for roots and crown and box 2 for length. I also recommend 45 mins to 1 hr before washing out with a little shampoo. I use herbal essence long-term relationship and the John Freeda Frizzeaze deep conditioner (moisture repair) followed by a combo of a quarter size of syrum and a dollar of the same brand straight fixation styling cream. I have very frizzy hair and lots of it. Looks gorgeous after.
Goodluck!
Maybe you need to beach your hair a bit to brown, then color it with this color. I’m not an expert, but I think if your natural hair color is darker than the hair dye, it won’t show. On the box it often says which natura haircolor it’s recommended for, og you want too see a good result.
ok I know this is old but I would like to point out to anyone reading the above comments (specifically Kims) that NONE of the L’Oreal PREFERENCE colours contain or tell you to use shampoo when dying. It will wash the color out!! The extra bottle that comes with the darker colours of PREFERENCE are COLOR REFRESHERS. is NOT for right away! in fact, it even says in the instructions that you don’t apply it until weeks TWO and FOUR as a literal “refresher” if the color is starting to fade. I personally have never had a problem and I’ve been using Preference for about 15 years now. I would also like to add that if you have shoulder length or even a couple inches longer than that hair, you don’t need more than one bottle.(This advice applies ONLY to Loreal Preference dyes! All other brands are hit and miss. I have extremely thick hair, AND even when it was halfway down my back I was having no issues using one bottle. If all else fails, and you’re really not sure, buy two, use the first and if you need more you can open the second and if not you can take it back!