DecoMoldings

inspiration · Arched

F&B Lamp Room Gray Arched Wall Molding

F&B Lamp Room Gray Arched Wall Molding: wall elevation, color data (LRV 43.8), living room layout for 12, 15, 18 ft walls, cut list, calculator and pre-cut ki

Catalog snapshot View 2 sources ↓

Project calculator

Wall molding linear-foot estimate

Estimate for rectangular molding frames.

Estimated quantity122.28 linear feet

Divide by 7.87 ft (240 cm stick) and round up for the number of sticks.

Formula & assumptionsframe_count * 2 * (frame_width_inches + frame_height_inches) / 12 * (1 + waste_percent / 100)

Assumes identical rectangular frames. The waste allowance is editable. The estimate does not optimize cuts or include separate rails, baseboards, or other trim.

Overview

F&B Lamp Room Gray is a light gray with a green undertone and a calculated LRV of 43.8. Against white trim the contrast ratio is 1.94:1, which gives soft contrast; painted tone-on-tone, the arched pattern shows only through its shadow lines.

Arched layout on a 15 ft living room wall

Molding over the full wall height, upper and lower rows divided by a chair rail. On a 15 ft wall with an 8 ft ceiling this gives 5 frames per row, each 31.2 in wide, with 50 in upper and 21 in lower frames. The layout uses about 40.43 m of 2.5 cm molding, or 17 sticks of 240 cm, including 10% waste. Center the layout on the sofa or TV rather than the wall when furniture is off-center.

Building the arched pattern

Arched tops are pre-formed in MDF; the straight sides and the bottom rail are cut to the same width as the arch. Fix the arch first, then hang the sides from it.

Painting molding in F&B Lamp Room Gray

Grays sit in the middle of the contrast range: white trim reads clearly, while same-color trim gives a quiet, architectural look.

Wall elevation

F&B Lamp Room Gray wall, tone-on-tone trim, arched layout on a 15 ft wall. Colors are screen approximations.

Color data

ColorBrandCodeHexCalculated LRVUndertoneDepthContrast vs white trimContrast vs black trim
F&B Lamp Room GrayFarrow & Ball#B2B1A943.8greenlight1.94:17.66:1

Trim color pairings

PairingTrim colorHexContrastEffect
tone-on-toneF&B Lamp Room Gray#B2B1A91:1Trim painted the same color as the wall
matching whiteBM White Dove#EFEEE51.85:1White with the closest undertone
contrastWhite#F4F3EE1.94:1Light trim for crisp contrast

Living Room wall sizes: arched accent wall layout

Wall widthFrames per rowFrame widthFrame height (upper / lower)Molding incl. 10% waste240 cm sticksChair rail pieces (300 cm)
12 ft431 in50 / 21 in32.26 m142
15 ft531.2 in50 / 21 in40.43 m172
18 ft631.3 in50 / 21 in48.6 m212

Cut list for a 15 ft wall

Planning cut list
PieceQuantityLength
Frame top and bottom (lower row)1031.2 in
Frame sides (lower row)1021 in
Arch frame sides (upper row)1034.4 in
Arch top + bottom rail (upper row)531.2 in span
Chair rail2300 cm lengths

Pre-cut kits for this wall

Pre-cut kits that fit this project. Open a kit for photos, options and pricing.

Flexible Arch Trim Wall Molding Kit | Pre-Cut MDF Decorative Wall Panels01 / KIT

Flexible Arch Trim Wall Molding Kit | Pre-Cut MDF Decorative Wall Panels

From $83.40

View kit
Double Arched Wall Molding Set | Pre-Cut MDF Decorative Wall Panels02 / KIT

Double Arched Wall Molding Set | Pre-Cut MDF Decorative Wall Panels

From $133.60

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Modern Arched Wall Panel Kit: Pre-Cut MDF Wall Molding03 / KIT

Modern Arched Wall Panel Kit: Pre-Cut MDF Wall Molding

From $140.00

View kit
Flexible Arched Wall Molding, Paintable MDF Wall Trim, Pre-Cut Arch Decorative Wall Panels | Picture Frame Molding, Accent Wall Trim04 / KIT

Flexible Arched Wall Molding, Paintable MDF Wall Trim, Pre-Cut Arch Decorative Wall Panels | Picture Frame Molding, Accent Wall Trim

From $73.60

View kit
U Shaped Arch Wall Trim Molding Kit | Pre-Cut MDF Medium & Large05 / KIT

U Shaped Arch Wall Trim Molding Kit | Pre-Cut MDF Medium & Large

From $81.40

View kit
Half Wall Arched Wainscoting Panels Kit | Pre-Cut MDF Easy Installation06 / KIT

Half Wall Arched Wainscoting Panels Kit | Pre-Cut MDF Easy Installation

From $73.60

View kit

Questions

How much molding do I need for a 15 ft living room wall with arched frames?

About 40.43 m (133 linear ft) including a chair rail and 10% waste, which is 17 sticks of 240 cm. That assumes 5 frames per row, 31.2 in wide, on an 8 ft ceiling.

Is F&B Lamp Room Gray warm or cool?

F&B Lamp Room Gray has a green undertone and reads as a light gray. Its calculated LRV is 43.8, so it sits in the mid range, where molding shadows show clearly.

Should trim be the same color as F&B Lamp Room Gray walls?

Painting the molding the same color gives a modern, tone-on-tone finish where only shadows show the pattern. White trim adds soft contrast (1.94:1), and black trim gives 7.66:1.

How high should the chair rail be in a living room?

About one third of the ceiling height: 32 in on an 8 ft ceiling, 36 in on 9 ft and 40 in on 10 ft. Center the layout on the sofa or TV rather than the wall when furniture is off-center.

Trace the details

Sources & dates

Prices, options and photos come from our product catalog on the date shown. Layout tables are planning estimates; measure your wall before ordering.

  1. Paint color dataset (screen approximations; LRV calculated)Recorded November 11, 2026
  2. DecoMoldings product catalogRecorded November 11, 2026