
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.

Cumbria's stone varies more than people expect, from cool blue-grey slate-stone to warm sandstone, and each responds differently to frame colour.
Stone is the single most common fixed material homeowners are matching frame colour against in this region, and it is also the material most often photographed under misleading light. A quick site visit reveals that 'grey stone' covers a wide range, from the cool, almost blue-grey Lakeland slate-stone common around Windermere and Coniston, to the warmer, more buff sandstone found further east towards Penrith and the Eden Valley.
This guide breaks stone types down by tone and gives starting-point RAL recommendations for each, alongside notes on rendered and whitewashed stone finishes.
Common across the central and western Lakes, this stone reads cool and slightly blue in overcast conditions and warms only marginally in direct sun. Anthracite grey (RAL 7016) is the most reliable match, being cool enough to sit tonally with the stone without disappearing entirely. Jet black (RAL 9005) also works well here, particularly on properties with simple, well-proportioned openings. Warm bronze and brown tones tend to sit less comfortably against this particular stone.
Found more often towards Penrith, Appleby and the Eden Valley, buff sandstone has a warm, golden undertone that pairs naturally with warmer frame colours. RAL 7039 quartz grey, RAL 8017 chocolate brown, and bronze metallic finishes all complement this stone more successfully than a very cool anthracite. Jet black can still work but tends to read as a more deliberate, high-contrast statement against warm stone rather than a tonal blend.
Traditional Lakeland farmhouses are frequently whitewashed or lime-rendered over stone, giving a pale, slightly textured background that suits almost any dark frame colour. This is where the strongest contrast options, jet black and anthracite grey, tend to look their best, since the pale, uniform background lets the frame colour read cleanly without competing texture or colour variation from the stone itself.
| Stone or finish | Strong starting colours | Approach |
|---|---|---|
| Cool grey Lakeland stone | RAL 7016, RAL 9005 | Tonal or confident contrast |
| Warm buff sandstone | RAL 7039, RAL 8017, met-brushed-bronze | Warm tonal pairing |
| Whitewashed or lime render | RAL 9005, RAL 7016, RAL 6009 | High contrast reads best |
| Coursed rubble with visible mortar | RAL 7016, RAL 7015 | Mid-tone greys avoid overwhelming texture |
Stone colour shifts more than most materials depending on whether it is wet or dry, in shade or direct sun, and even the time of year, as moss and lichen colour can change the overall tone. Always view a sample panel against a dry section of wall in daylight, ideally on more than one day, before finalising your colour.
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