According to stylists, the Duchess uses tonal jumpers and matching jackets with dark trousers for a polished appearance. 

Kate, 39, wore a matching £299 pink coat and £75 roll neck jumper, both from Hobbs, tailored trousers and suede pumps for the outing to Nower Hill High School in Harrow on Wednesday.

This outfit shows the consistent, formulaic style that the Duchess of Cambridge has adopted in dressing her over the past few months. She has donned a colourful jumper with a tonal coat and darker trousers at four recent engagements. 

FEMAIL stylists shared their knowledge with FEMAIL. They explained that this “scientific” use of colours creates elegant yet simple outfits, which are ideal for busy mothers-of-three.  

According to stylists, the Duchess uses tonal jumpers and matching jackets with dark trousers in order to achieve a polished appearance. Kate, 39, wore a matching £299 pink coat and £75 roll neck jumper, both from Hobbs, tailored trousers and suede pumps for the outing to Nower Hill High School in Harrow on Wednesday, pictured

In March, Kate visited a school in east London today to promote a mental health programme for children. The mother-of-three cut a stylish figure as she paired a bright pink jumper with a £389 blush coat from Max and Co

On several recent outings, Kate Middleton has opted for a colourful knit and jacket with neutral navy trousers

Kate today visited an East London school to support a children’s mental health program. The mother-of-three cut a stylish figure as she paired a bright pink jumper with a £389 blush coat from Max and Co (left). Right, for an Earthshot Prize event in October, Kate  dusted off an emerald Erdem coat, pairing the statement piece with a fitted lime green jumper

FEMAIL color coding can be quite scientific according to Hannah Eichler, a stylist who told FEMAIL that Hannah loves monochromatic styling and often creates coat-and-knitwear combinations in tonal colors to make her look polished. 

‘Buying clothes in colour families is an easy way to create a hard working wardrobe – your pieces will always go together and be easy to mix and match.’

She continued: ‘Whether you’re a prep the night before or throw outfits together at the last minute, colour coding has become the way to look instantly pulled together.

‘This certainly isn’t a new styling trick in the royal family – the queen has long favoured wearing families of colour, often matching her coat with her hat and bag.

‘The trick to colour coding is actually quite scientific – it’s all about looking at spectrums of colour, choosing linear shades which sit together in the same family. 

‘With a busy diary like Kate’s it’s also a space saver for travelling, as she can pack a monochromatic selection of clothes which work together seamlessly. 

‘The trick is to look for clothes which are a variation of the same hue – for example teaming a magenta pink with a baby pink, or bottle green with emerald.’

Meanwhile stylist Rochelle White revealed dressing in this ‘uniform’ kept things ‘simple but effective’ for Kate, saying: ‘This formula is the easiest way to polish and pull together a look. You can look confident in this way and convey elegance, refinement, and effortless smoothness.

In September, Kate wore a cream Reiss 'Larsson' double-breasted twill blazer worth £285 and a white 'Binky' blouse by Jane costing £440, for a visit to RAF Brize Norton

In September, Kate wore a cream Reiss ‘Larsson’ double-breasted twill blazer worth £285 and a white ‘Binky’ blouse by Jane costing £440, for a visit to RAF Brize Norton

“I think Kate understands that, and is determined to appear fashionable while on the streets.

Tonal dressing is about bringing interest and depth to an outfit by focusing on the harmonisation of colours.

Continued she: “I think Kate has decided to wear simple and effective clothing for Autumn/Winter.” 

“Her previous outings, engagements, and looks have all been very similar. However she is now using colours and accessories. 

“I believe she knows that media attention is on her clothes and she prefers simplicity to maintain the focus of the media. 

In May Kate looked elegant in a £380 Tory Burch polka dot blouse, a tonal navy coat and wide-leg trousers as she joined William in Wolverhampton at three community organisations helping children and young people with their mental health

In May Kate looked elegant in a £380 Tory Burch polka dot blouse, a tonal navy coat and wide-leg trousers as she joined William in Wolverhampton at three community organisations helping children and young people with their mental health 

“Keep it simple and black, but you can dress it up or make it more tailored for each occasion.

The Royal’s first appearance in the new style was earlier in the year when she went to London school.

In March, Kate visited a school in east London today to promote a mental health programme for children.

The mother-of-three cut a stylish figure as she paired a bright pink jumper with a £389 blush coat from Max and Co.

She finished her outfit with £130 high-waisted Jigsaw trousers, which she first wore during a visit to the Henry Fawcett Childrens Centre in Lambeth in 2019.

She went on to replicate the look in May when she visited to Wolverhampton with the Duke. 

Berry nice! The most recent example was this pink-on-pink look from an outing in London on Wednesday

During the visit the Duchess joined a science lesson studying neuroscience and the importance of early childhood development

Berry good!  This pink-on-pink outfit was the latest example from Wednesday’s outing to London. 

On that occasion,  Kate looked elegant in a £380 Tory Burch polka dot blouse, a tonal navy coat and wide-leg trousers as she joined William at three community organisations helping children and young people with their mental health.

As she was returning to royal duty in the fall, September saw her return to the same outfit she wore last summer.

The 39-year-old mother-of-three wore a cream Reiss ‘Larsson’ double-breasted twill blazer worth £285 and a white ‘Binky’ blouse by Jane costing £440, which she accompanied with a £295 Tusting ‘Holly’ mini bag. 

And she donned a similar outfit when she joined Prince William at Kew Gardens for an educational event tied to his Earthshot Prize initiative.

The royal dusted off an emerald Erdem coat last worn in 2016 for the outing, pairing the statement piece with a short-sleeve fitted lime green jumper and wide-leg black trousers.