Choosing the colour of your bifold doors sounds like the simplest part of the buying process. In reality, it's one of the decisions people second-guess most — because unlike the size and configuration, you'll be living with the visible finish every day for the next 25–40 years.
This guide covers the most popular aluminium bifold colours in 2026, what each one actually looks like on real houses (not brochure renders), how the colour choice interacts with your brickwork, roof, and interior — and what to consider before committing.
The short answer
The three most-ordered aluminium bifold colours in the UK in 2026 are, in order:
Anthracite Grey — accounts for roughly 40% of orders
Black — around 20%
Agate Grey (a slightly lighter grey) — around 12%
Together they account for over 70% of all direct orders. White, dual-colour finishes, and bespoke RAL colours make up the rest.
For most homeowners, one of the three greys is the safe, on-trend choice that will still look current in ten years. The real question is which grey — and whether you want the same colour inside and out, or a different one.
Anthracite Grey — the safe modern default
Anthracite Grey (RAL 7016) has been the dominant bifold colour in the UK for nearly a decade, and shows no sign of losing its top spot. It's dark enough to feel contemporary and framed rather than washed out, but softer than pure black.
Why it works so widely: Anthracite is a chromatic grey — it has hints of blue and dark green in it rather than being flat neutral. That means it plays well with almost any brickwork colour: red brick, London stock, buff, grey brick, or render. It also complements most roof colours, from slate through to clay.
Where it can fall flat: on very dark or very traditional properties where the frame disappears into the background. If you have a black slate roof, black rainwater goods, and dark brick, Anthracite can look muddy. In that case, either go proper Black for consistency, or step up to Agate Grey to add contrast.
Interior effect: dark enough to frame the view, light enough not to dominate the room. Works with almost any interior style — kitchen units in white, sage, navy, and cream all pair well.
Black — the statement choice
True Black (RAL 9005 or the deeper RAL 9017) has grown fast as a bifold choice since about 2022. It's now the second most popular option and continues to gain share on Anthracite.
Why people choose it: Black gives maximum contrast against light backgrounds — white render, buff brick, cream stone. On the right property, it looks striking and architectural, more like something from a high-end magazine than a suburban extension.
Where it can be a mistake: on already-dark properties, Black can look grim and heavy, particularly in winter light. In north-facing installations where the doors get little direct sun, deep black can feel oppressive from inside the room.
Interior effect: Black frames define the view sharply and add graphic drama. The interior needs to earn the drama — a plain magnolia room with black bifolds can feel like the doors were installed in the wrong house. It works best with considered interior design (matt black kitchen handles, black taps, dark timber).
Practical note: Black shows scratches, dust, and fingerprints more than any other colour. It's not a maintenance nightmare, but it does need wiping more often than lighter finishes.
Agate Grey — the softer middle ground
Agate Grey (RAL 7038) is a lighter, warmer grey — closer to a stone or dove tone than the darker charcoal of Anthracite. It's chosen most often by buyers who want the modern feel of aluminium without the darkness of Anthracite or Black.
Why it works: Agate reads as neutral rather than dark. It pairs beautifully with period properties, cottages, and softer traditional architecture where full Anthracite can feel too industrial. It's also a good pick for smaller openings where a darker frame would visually dominate the wall.
Where it can be a mistake: on modern, sharp-edged properties where the softness of Agate can look accidentally beige. If you're going for a clean architectural look, one of the darker greys will typically read better.
Interior effect: blends into most rooms without demanding attention. It's the colour you notice least — which is exactly what some homeowners want.
White — cleaner than you might expect
Pure White (RAL 9016 or 9010) is a smaller share of the bifold market — around 5–8% of orders — but it's specifically the right answer for certain properties.
Why people choose it: White works on contemporary rendered houses where the frame is meant to blend into the walls rather than contrast with them. It also suits period properties where a darker frame would look anachronistic, and coastal properties where the "seaside cottage" aesthetic calls for a lighter finish.
Where it falls short: on brick properties, white can look plasticky and reminiscent of uPVC — which is exactly the association aluminium buyers usually want to avoid. If you have brick walls, one of the greys will almost always suit better.
Practical note: modern powder-coat White finishes are far more durable and less prone to yellowing than the uPVC-era White finish people associate with older windows. It won't discolour like uPVC does.
Interior effect: disappears into a light-walled room. Maximises the visual sense of space in smaller extensions.
Dual colour — different inside vs outside
Dual-colour finishes let you choose one colour for the exterior and a different one for the interior. It's a growing choice, particularly for kitchen extensions where the outside colour needs to match the house exterior but the interior colour is chosen to work with the kitchen palette.
Most popular pairings in 2026:
Anthracite Grey outside / White inside — 40% of dual-colour orders. Modern exterior, bright kitchen interior.
Black outside / White inside — 20%. High contrast, kitchen-magazine look.
Anthracite Grey outside / Anthracite Grey inside — technically not dual-colour but often quoted as one. Full-monochrome consistency.
Black outside / Grey inside — 15%. Softens the interior impact of a bold exterior.
Bespoke pairings — the remaining 25%. Popular options include RAL 6009 (dark green) outside for cottage properties with a lighter interior.
Why it's worth considering: it lets you have your cake and eat it. Modern exterior finish, warm interior that doesn't fight your kitchen units.
Cost: most manufacturers now include dual colour at no extra cost. Some legacy suppliers still charge a small premium. Confirm before you commit.
Bespoke RAL colours — for when standard isn't right
Beyond the standard palette, most manufacturers can match any RAL colour code. This costs 5–15% more than a standard colour and typically adds a week or so to the lead time — because the frame has to be individually powder-coated rather than pulled from stock.
Most-ordered bespoke colours in 2026:
RAL 6009 Fir Green — dark heritage green for cottage and country properties
RAL 8017 Chocolate Brown — warmer than Black, softer on rural properties
RAL 7015 Slate Grey — between Anthracite and Agate, with a hint of blue
RAL 9017 Traffic Black — the deepest, most saturated black available
RAL 5011 Steel Blue — coastal properties and heritage marine influences
If your property has strong existing colours (a coloured front door you love, distinctive brickwork, painted render), pulling that colour through to the bifold frame can look considered rather than random. Show your fitter a physical sample of the target colour before you commit — RAL swatches on a screen don't accurately represent how the finished powder coat will look.
How to choose the right colour for your property
Six practical questions worth working through:
What colour is your brickwork or render? Match tone rather than trying to match exactly. Warm-toned brick (red, orange, buff) pairs with warm-toned frames (Anthracite has enough green to work; Agate is warmer still). Cool-toned brick (grey, blue, stock) pairs with cooler frames (Black or Slate Grey).
What colour is your roof? The frame should relate to the roof rather than fight it. Slate roofs pair naturally with Anthracite and Black. Clay tile roofs pair with Anthracite, Agate, or Chocolate Brown. Rendered or metal roofs give you more freedom.
What colour are the existing windows? Consistency matters. If your other windows are white uPVC and you're not replacing them, going with an Anthracite or Black bifold creates a visible mismatch. Either match the existing frames or plan to replace them at the same time.
What direction does the opening face? North-facing openings get less direct light, and dark frames can look heavy in the dimmer light. If your opening faces north or east, consider Agate or Anthracite over full Black.
How much do you notice the interior view? Bifolds have two sides. If the interior view matters (you spend time facing the doors from a kitchen or dining area), pick the interior colour deliberately — this is where dual-colour finishes earn their place.
What does the neighbouring property look like? Not to match, but to avoid clashing. In terraced streets particularly, a distinctive colour choice can look striking or accidental depending on the neighbours.
2026 colour trends
Three trends visible in current order patterns:
Black is still growing. It went from a niche choice five years ago to 20% of orders today. In new-build and architect-designed extensions, it's now the default rather than the statement.
Dual-colour is normalising. No longer a premium option, no longer unusual — most manufacturers include it as standard. Expect it to become the default expectation rather than a talking point.
Bespoke RAL is up in premium buys. Homeowners spending over £5,000 on their bifolds are increasingly willing to spend a little extra on a colour that specifically suits the property, rather than one of the standard three.
What isn't trending: heavy woodgrain effects (the aluminium buyer wants aluminium to look like aluminium), and highly polished metallics (they date faster than matt finishes).
Common questions
Will my colour fade over time?
Modern powder-coat finishes are extremely stable. Under normal UK conditions, expect no visible fading in the first 15 years and only very slight fade after 25 years. Coastal properties and south-facing installations may see marginally faster fade, but nothing dramatic.
Can I paint my bifold doors a different colour later?
Technically yes, but not easily and not well. Aluminium powder coats aren't designed to be painted over — the finish that goes on top rarely bonds properly and tends to peel. If you think you might want to change the colour, order the right one first.
Do dark colours cost more?
No. Standard powder-coat colours (Black, Anthracite, Agate, White) are all typically the same price. Bespoke RAL colours cost more, but that's about the manufacturing process, not the colour choice itself.
Do dark colours affect thermal performance?
Marginally. Very dark frames absorb slightly more solar heat, which can be a positive in winter (a little extra warmth transferred to the frame) and a negative in summer (slight expansion, mostly not noticeable). In the UK climate, it's not a factor worth worrying about for domestic installations.
Should the bifold match the front door?
It's a nice detail if you can, but not essential. Front doors are usually a different material (composite, timber, or steel) and won't match a powder-coat frame perfectly anyway. What matters more is that the colours don't clash — an Anthracite bifold at the back works fine with a green or oak front door at the front.
Are there any colours I should avoid?
Very bright colours (red, orange, bright blue) rarely age well on a large frame area — what looks bold on day one can look dated within a decade. Pastels can look accidental. Stick to considered choices — the classic grey palette, Black, White, or a specific heritage colour that suits your property.
See the colours in person
Colour swatches on a screen don't tell you what a finished bifold will actually look like. Physical samples and real installation photos are far more reliable — request either from the manufacturer before you commit, particularly if you're going with a bespoke or unusual colour.
Our online configurator shows every standard colour with real product imagery, and physical samples are available on request. Every finish is applied at our Derbyshire factory to a matt powder-coat standard, with a 10-year guarantee against fading, chipping, and peeling.
