Men's blue blazer

The men's blue blazer from Hackett London is the cornerstone piece of British tailoring: from deep navy to steel blue, through royal and teal, the range covers every expression of a colour that has defined formal and informal British menswear for generations.

Navy as the foundation of the male wardrobe

The men's blue blazer in its navy version — the dark blue with a faint red undertone that distinguishes it from prussian blue and indigo — is the most widely replicated structural piece in the history of British menswear. Hackett London, with over four decades of continuous presence in the category, has made navy the system colour of its collection: the tone from which everything else is built. Models in pure merino wool at 280–320 g/m² deliver navy at its deepest and most formal. Lightweight wool models at 220–250 g/m² carry the same colour in a more spring-appropriate, less structured version.

Hackett London men's blue blazers in lighter tones — royal blue, electric blue, steel — are higher-character pieces for those who already have navy in the wardrobe and are looking for a second blue with more personality. These tones perform best in lightweight fabrics such as cotton or linen-cotton blends, where the luminosity of the colour is amplified by the natural texture of the cloth.

How to wear a blue blazer

The Hackett London men's blue blazer pairs naturally with a wide range of colours without requiring considered chromatic planning. Two concrete combinations:

Navy merino wool blazer over a white shirt, grey flannel trousers and brown leather oxford shoes: the classic British code that works in any professional setting, anywhere in the world, without requiring accessories to complete it.
The same blazer over a white cotton piqué polo, beige heavy cotton chinos and tan leather loafers: the smart casual register for the weekend or a relaxed Friday in the office.

The navy blazer with gilt buttons — the regatta blazer in its most recognisable form — is another expression in the Hackett London collection, bringing a slim fit contemporary cut to an aesthetic rooted in British sailing and club culture. Engraved buttons with an anchor motif or club emblem are a detail Hackett London uses with purpose: present when the model calls for it, absent when the register aims for something quieter.

Navy and professional dress codes

The men's blue blazer in navy is the colour most broadly accepted across professional formal environments worldwide. Its ability to communicate authority without ostentation makes it the right choice wherever grey reads as too restrained and black as too categorical. Hackett London offers navy across multiple construction levels — from full canvas in the leading models to semicanvas in the daily range — maintaining the same external finish standard throughout.

How to find your size

Hackett London men's blue blazers follow standard European sizing. Navy in pure wool is the colour that makes fabric tension most visible: horizontal creases across the shoulders or diagonal pulls across the chest read clearly at a distance. Choosing the correct size matters — the chest should close without tension when buttoned and the shoulders should sit exactly at the natural shoulder edge without rolling forward.

Can a navy blazer be worn with a blue shirt?

Yes, if the blue of the shirt is sufficiently different from the blue of the jacket. A pale blue or blue Oxford shirt worn under a navy blazer produces a coherent tonal layering that sits within British tailoring tradition. A mid-blue or cobalt shirt, however, creates a poorly defined chromatic contrast that tends to read as an oversight rather than a choice. The rule of thumb: either very different tones — sky blue on navy — or mix pattern with plain — a thin stripe shirt under a plain blazer.

How do you keep a navy blazer from fading?

Navy fades progressively, most visibly in high-friction areas — elbows, cuffs, lapel edges. Limiting dry cleaning to the necessary minimum preserves the depth of colour longer than frequent cleaning cycles. Between uses, store the blazer on a wide wooden hanger away from direct sunlight. UV exposure is the primary cause of long-term navy fading.

Navy or royal blue: which to choose?

Navy is the correct starting point for most wardrobes: more formal, more neutral, compatible with more contexts and easier to build around. Royal blue is a character choice — right for those who already have navy and want a second blue with more presence. Royal blue works best in lightweight fabrics and slim cuts; it tends to read as excessive in heavy fabrics or relaxed fits.