She can wear whatever colours she wants waist down, but near the face, everyone has their best colours and it's their best colours that will make them look their best. So what matters for colour flattery is the shades of her blouse, jacket, necklace, earrings, scarves etc.
Nina's best colours are COOL & CLEAR.
She also have a very low contrast between her skin & hair & eyes - so soft or medium intensity colours are called for. Anything strong, bold, vivid will over power her.
Very simple.
3 things: Cool, clear & medium intensity.
Anything else will make her look, ahem, not her best.
WRONG
Mustard is too warm and too muted for Nina. Mustard is about the worst colour Nina should wear. It makes her look pale, drawn and tired. Maybe that's appropriate, given Patrick just died...
WRONG
Yellows & oranges are all wrong for a complexion with cool undertones. The off white s good, but the neckline is quite low so it doesnt negate the bad Camilla vest colours.
WRONG, but....
The chambray vest here works - in fact, as long as the chambray isnt too yellow based, it will be a great colour for Nina. pity she doesnt wear it more often.
The yellow top is warm, which is bad. However but it's quite clear in its depth and the intensity is right, which is good. It also has small stripes in warm colours, which don't help (orange, salmon). Overall, she can do better.
WRONG
This Tigerlily jacket is way too warm & strong for someone with Nina's colouring.
WRONG
The off white jacket/top is great for Nina's complexion.
But that bright orangey red tank is a no go zone. It's too warm & too bright.
WRONG
This henley has the softness which Nina's complexion needs. However it's too muted - there is no purity/clarity in the colour. If she wants a soft pink, it's better to be a more icy or rose shade and less orchid-y. These shades also have less yellow in them.
WRONG
The salmony colour of this mesh tee is very wrong for Nina's colouring. While the intensity is fine, the colour has too much yellow in it. For someone with her coloring, this shade makes them look ill.
WRONG..so wrong
This outfit is so wrong. The green is overdosed in a yellow undertone. It's also too bright for her soft complexion & hair. You notice the top before you notice her.
As Yves Saint Laurent once said....
When the clothing overpowers you, it's time to change the clothing.
Also the scarf is every shade of salmon, which is pink with yellow undertones. very wrong. To make things worse, the scarf has tones of beige/camel, more warm shades.
For completeness, the high neckline of this top won't work on anyone with medium-large boobs. Most high necklines don't work for medium-large boobs.
RIGHT
Mint green sings on Nina. It's cool & clear & soft. Perfect.
Brighter greens like the next one don't work as well on her - too much yellow & too much bright.
WRONG
WRONG
How about this green Oneseason dress? It's not ideal - the colour was tinged with too much yellow although it was the right intensity.
RIGHT
This shade of off white is perfect on Nina & it isn't distracted with any wrong shades.
WRONG
This appears to be a cool pink with medium intensity - seems to work.
WRONG
This look is so so wrong - not only is the salmony-taupe a wash out, the bright red camisole is too over powering for someone with Nina's colouring.
Now let's move to the blues.
RIGHT
A blue with as little yellow as possible is best for Nina.
Like aqua. Unlike Turquoise shades.
This aqua is intense, maybe a little too much, but overall it's not too bad.
RIGHT, even better
This blue is great for her - it's even cooler than the aqua and the white in between breaks it up.
RIGHT
This Tigerlily dress was great. Medium intensity, very little yellow. I cant be 100% until I see the actual fabric in natural light, but it does seem to have some muted characteristics - but that isn't anywhere near enough to undo the good characteristics (cool & medium intensity).
WRONG
This colour of this henley is interesting. It'f the right amount of softness and it's cool, but its too muted. Not by a mile, but still too muted.
Now compare it to the blue in the below photo - similar softness, also cool but totally clear. Now that's perfect for Nina.
RIGHT
sort of WRONG
We love the off white jacket. But black is the worst colour Nina can wear. For anyone with her fair colouring it's too harsh. It's lucky she wasn't wearing it as a high neckline.
If you want to wear black & you have fair colouring, you will look much much better in other dark shades like navy or bottle green or chocolate or charcoal. Obviously what you choose as your black substitute will depend on your skin tone & colouring.
RIGHT
These colours are perfection. Clear, soft & cool. Even though the scarf technically is warm (cream), the varying tones of cool blues sing on her.
Summary
It looks like the wardrobe department was getting Nina's colour right when the show aired for the first couple of seasons. But lately, her clothing has been very bright & very warm and/or muted in its tones.
That's why she needs to see a colour consultant.
Don't forget:
First: If you are wearing the WRONG colour, people will say:
"Gee, that's a pretty top."
If you are wearing the RIGHT colour, people will say:
"Gee, you look well."
Which compliment do you want?
Second:
If you love a colour but cant wear it near your face, wear it waist down, on your wrist, as a belt or as shoes. Easy.