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A classic white architectural facade features a front door coated in dark Railings No. 31 (Hex #45494c), flanked by topiary in terracotta pots.
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Railings No. 31

Farrow & Ball
LRV 7.0

Farrow & Ball Railings No. 31 is a soft black with profound blue undertones. More blue than a true black, this dramatic shade transforms into a rich charcoal-navy depending on the light, perfect for commanding front doors and enveloping interiors.

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Paint Technical Profile

Color ID / SKU No. 31
HEX Code #45494c
Light Reflectance (LRV) 7.0
Temperature Cool
Primary Undertone Blue
Hidden Undertones Charcoal
Use Interior, Exterior
Best Exposures South-facing, North-facing
Best For Front doors, kitchen islands, dramatic dining rooms, cabinetry, exterior trim

Digital Visualizations & Applications Explore curated design concepts and coordinating palettes.

A split digital conceptual layout featuring a classic paneled front door painted in a soft black above a physical materials flat-lay.

Exterior visualization: A dramatic soft black hue applied to a traditional front door set into red brick.

Design Specifications

  • Lighting Exposure:Overcast soft daylight
  • Exterior Siding:Red brick
  • Hardware Finishes:Polished nickel
  • Greenery:Potted olive tree
A split digital conceptual board highlighting a Farrow & Ball Railings kitchen island over a textured bottom section of quartzite and oak.

Digital color test: A bold, soft black island anchoring an airy kitchen with wide plank white oak flooring.

Design Specifications

  • Lighting Exposure:Bright southern morning light
  • Perimeter Cabinets:Farrow & Ball Ammonite
  • Countertop:White Macaubas quartzite
  • Flooring:Wide plank white oak
  • Barstools:Woven leather

Complementary Paint Colors

Ammonite Farrow & Ball • No. 274
This composite digital board presents a color-drenched dining room in No. 31 paired with a lower flat-lay of dark walnut and brass.

Spatial concept: A fully color-drenched dining space in deep blue-black, illuminated by a warm brass chandelier glow.

Design Specifications

  • Lighting Exposure:Low-lit moody evening with warm chandelier glow
  • Flooring:Dark walnut
  • Ceiling Color:Farrow & Ball Railings
  • Dining Table:Burl wood
An 80/20 digital visualization displaying built-in pantry cabinetry painted in a dark blue-black above a physical slate and brass flat-lay.

Material study: Deep charcoal-blue pantry built-ins contrasted with an off-white Zellige tile backsplash and satin brass hardware.

Design Specifications

  • Lighting Exposure:Filtered western light
  • Hardware Finishes:Satin brass
  • Backsplash:Zellige tile in off-white
  • Flooring:Honed slate
A split digital board illustrating dark charcoal exterior window trim contrasting with light stucco above a physical exterior materials layout.

Architectural test: Soft black exterior trim framing windows against light stucco, accented by an aged copper lantern.

Design Specifications

  • Lighting Exposure:Crisp morning sunlight
  • Siding Color:Farrow & Ball Cornforth White
  • Roofing:Slate tiles
  • Lighting Fixtures:Copper lanterns

Complementary Paint Colors

Cornforth White Farrow & Ball • No. 228

Room Compatibility & Clashes Diagnoses

Hackrea's reports evaluating the compatibility of Railings in real rooms.

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