Color spec
| Brand | Farrow & Ball |
| Name | Railings |
| SKU | No. 31 |
| Hex | #3A3D3F |
| RGB | 58, 61, 63 |
| HSL | 204°, 4%, 24% |
| LRV | 6 |
| Undertone | neutral with no strong undertone |
| Family | Black |
What Color Is Railings, Really?
Railings (No. 31) is a very dark near-black with a faint blue-gray lean. Its measured numbers tell the story: an LRV of 6 puts it near the bottom of the scale, so it reads as black in most rooms, while a hue sitting in the blue range at only 4 percent saturation means the blue is a whisper, not a statement. In practice you get a soft, slightly cool black rather than a flat jet black.
Farrow & Ball pushes this black-blue for front doors and external woodwork, and that is where it earns its reputation. It gives depth and a hint of ink without the harshness of a pure black, so architectural details still show shadow and shape.
It suits period homes, modern facades, and anyone who wants a serious dark that feels considered rather than stark. If true black looks heavy to you, Railings is the softer route.
On paper Railings leans blue, but with saturation at just 4 percent it is essentially a neutral dark with only a slight cool lean. Most of the time you will read it as a deep, near-black gray. The blue-gray character shows up in specific conditions rather than all the time.
Expect the cool side to surface under bright daylight, next to bright whites, and on large exterior surfaces where the sky and open light amplify any coolness. In a dim interior or under warm bulbs it flattens toward straight black.
To judge it honestly, tape a sample next to a true black and next to a warm black. Against the true black, Railings looks a touch softer and cooler. Against a brown-based black it looks bluer. Always test on the actual door or wall, not just a chip in your hand, because the surface size changes how much of that faint blue you notice.
Best Rooms and Uses for Railings
At LRV 6 this is a statement and contrast color, not a whole-home light. It is at its strongest on front doors and external woodwork, which is exactly the job Farrow & Ball recommends it for. On a facade it gives a smart, deep frame around windows, railings, and doors.
Indoors it works best as an accent or high-drama choice: a feature wall, a paneled library or study, joinery, built-in cabinets, or interior doors and trim. On kitchen or bathroom cabinets it reads as a soft black that pairs easily with wood and warm brass.
You can wrap a small room entirely in Railings for a cocooning, moody effect, but do it with intent and plenty of lighting. For most large living spaces, use it on the elements you want to stand out and keep the broad wall areas lighter, letting Railings do the heavy structural work.
How Lighting Changes Railings
With an LRV of 6, Railings absorbs almost all the light that hits it, so lighting changes its mood more than its brightness. It will stay dark in every room; what shifts is whether it reads cool or soft-black.
In north-facing rooms and on north or east exposures, the cooler light pulls out the faint blue and can make Railings feel crisp and slate-like. South and west light, especially in the afternoon, warms it and lets it settle into a deep, quiet black. On an exterior, the color will look coolest under open midday sky and richest at golden hour.
Bulb choice matters indoors. Warm bulbs around 2700K soften Railings and hide the blue. Cooler bulbs at 4000K and up keep the slate edge visible. Because it is so dark, add good task and accent lighting nearby, or the color can swallow the room.
Most complaints about Railings are a light mismatch. Upload a photo of your actual room and see it on your walls — then ask for the same wall in north light or evening lamps before you buy a single sample.
TEST IT IN YOUR LIGHT →Railings vs Similar Colors
Off-Black (No. 57) at LRV 7 is the closest comparison. It carries a warmer, faintly green-brown base, so it feels softer and more vintage, while Railings stays cooler with its blue-gray lean. Choose Off-Black for a mellow, aged black and Railings when you want a crisper edge, especially on exteriors.
Pitch Black (No. 256) at LRV 5 is a deeper, more true black with less discernible undertone. Next to it, Railings looks slightly lifted and cooler. If you want the darkest, most absolute black, go Pitch Black; if you want depth with a hint of ink and life, stay with Railings.
Black Blue (No. 95) at LRV 5 leans much further into blue. It is the pick when you actually want a navy-black to read as blue, whereas Railings keeps that blue as a barely-there suggestion.
Colors That Go With Railings
For crisp trim and contrast, All White (No. 2005) at LRV 84 gives you a clean, bright frame against the dark, and works well as ceilings or window trim when Railings is on the walls or door.
For walls that sit next to Railings woodwork, Cornforth White (No. 228) at LRV 60 and the warmer Elephant's Breath (No. 229) at LRV 50 keep things soft and grounded, so the dark reads as an intentional accent rather than a hole.
To build a tonal, layered scheme, step down through Down Pipe (No. 26) at LRV 11, a strong gray that bridges Railings and lighter neutrals. For a companion dark on shutters, a second door, or a feature wall, Hague Blue (No. 30) at LRV 6 adds richer color while staying in the same deep register. Natural wood tones and unlacquered brass or aged bronze hardware round it out.
Need It From Another Brand?
Any paint counter can custom-tint Farrow & Ball No. 31 directly — but if you would rather stay in one brand's own deck, these are the closest stock matches:
Similar Farrow & Ball colors
closest in the Farrow & Ball deckThe nearest shades to Railings within Farrow & Ball's own range, ranked by perceptual color distance — useful when you want the same look a touch lighter, darker, or warmer.
Coordinated palette
Generated by hue-rotating #3A3D3F in HSL space. Pair Railings with one accent and one neutral — the swatches below are starting points, not final picks.
Accessibility (WCAG contrast)
WCAG 2.1: AA = 4.5:1 normal text · AA Large = 3:1 large text · AAA = 7:1 normal text.
The Questions Everyone Asks
Is Railings warm or cool?
Railings is on the cool side of black, but only slightly. Its color sits in the blue range at very low saturation, so it reads as a soft near-black with a faint blue-gray lean rather than an obviously cool paint. Bright daylight and cooler bulbs bring out the coolness, while warm bulbs and afternoon light let it settle into a quiet, deep black.
Is Railings more blue or more black?
It is far more black than blue. With an LRV of 6 it reads as a very dark near-black in most rooms. The blue is present but faint, showing up mainly in strong daylight, on large exterior surfaces, or next to a warm-based black. Think of it as a soft black with a whisper of ink, not a navy.
What trim white goes with Railings?
All White (No. 2005), with an LRV of 84, is a strong pick for trim, ceilings, and window frames against Railings. Its brightness gives clean contrast that lets the dark stand out as intentional. If you want a slightly softer frame, Cornforth White (No. 228) at LRV 60 keeps the contrast gentler while still reading clearly lighter.
Does Railings work on cabinets and exteriors?
Yes to both. Farrow & Ball recommends it specifically for front doors and external woodwork, where it gives depth without the harshness of a pure black. On kitchen or bathroom cabinets it reads as a soft black that pairs easily with wood tones and brass hardware. Just add good nearby lighting indoors, since the color absorbs so much light.
What does an LRV of 6 mean for Railings in practice?
LRV measures how much light a color reflects, on a scale from 0 to 100. At 6, Railings absorbs almost all the light that hits it, so it stays dark in every room and reads as black to most eyes. It brings drama and contrast but very little brightness, which is why it works best as an accent, on woodwork, or on a front door rather than as a whole-room light color.
How is Railings different from Off-Black?
Off-Black (No. 57), at LRV 7, has a warmer, faintly green-brown base that makes it feel softer and more vintage. Railings is cooler, with its subtle blue-gray lean, so it looks slightly crisper, especially on exteriors. Choose Off-Black for a mellow aged black and Railings for a sharper, more contemporary dark.
Will It Work in YOUR Room?
No page can promise how Railings behaves in your light. Upload a photo and see it on your own walls in seconds — before you spend a cent on samples.
TRY RAILINGS ON YOUR ROOM →Ask a Question
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