
Flagship guide · 11 min read
Choosing the Right Window Colour: A Complete Guide
Frame colour is the single decision that does more to a house's character than almost any other, and it is one of the hardest to reverse once glazing is installed.

Internal frame colour behaves more like an interior finish than an architectural one, and is worth treating with the same care as skirting, doors and trim.
It is easy to treat internal frame colour as an afterthought once the external colour is settled, but it is a decision that will sit in every room with a window for the next two decades. On dual-colour systems, standard across most aluminium and Residence Collection ranges, internal and external colour are entirely independent choices, which opens up options that are worth considering properly rather than defaulting to white.
This guide covers how to choose internal colour to complement your interior decoration, when matching internal to external colour is the better route, and the practical trade-offs involved.
There is no single correct approach. A single colour throughout, most commonly white or a mid-grey, gives a simple, unified look and is marginally the cheaper and faster route to specify, since it removes an extra decision and, on some systems, a small dual-colour surcharge. Choosing an independent internal colour lets you treat the frame as part of the room's interior scheme rather than a fixed architectural element, which is particularly worth doing in rooms with strong existing decoration, such as a kitchen with dark cabinetry or a study with a heritage colour scheme on the walls.
| Internal colour | Character | Works well with |
|---|---|---|
| RAL 9010 pure white | Warm white, softens light | Most interiors, especially traditional decoration |
| RAL 9016 traffic white | Cooler, brighter white | Contemporary interiors, matched to white trim and ceilings |
| RAL 9001 cream | Warm, slightly heritage feel | Period interiors, exposed beams, traditional colour schemes |
| RAL 7035 light grey | Soft neutral grey | Contemporary interiors with grey or neutral palettes |
| Matching external colour | Consistent, architectural look | Loft conversions, garden rooms, and glazed extensions where frames read as a feature |
Lighter internal frame colours reflect more daylight around the window reveal than dark colours, a genuinely useful effect in rooms that rely heavily on natural light. This is a modest effect, not a substitute for glass specification or room orientation, but it is worth factoring in for north-facing rooms or smaller windows where every increment of reflected light helps.
If you are decorating around new windows rather than fitting them into an already-finished room, it is worth finalising your internal colour scheme, or at least your intended wall colour and skirting, before ordering frames, since matching paint to an installed frame colour is far easier than the reverse.
Internal steel-look doors and glazed partitions, increasingly popular for open-plan living and home offices, are a slightly different case, since both faces of the frame are seen internally. Here, colour choice is closer to a piece of furniture or joinery decision than an architectural one; black and anthracite steel-look internal frames remain the most requested finish, giving a crisp, defined line to a glazed partition, while white and light grey are chosen where a lower-contrast, more recessive look is wanted.
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