DecoMoldings

inspiration · Geometric

BM Duxbury Gray Geometric Wall Molding

BM Duxbury Gray Geometric Wall Molding: wall elevation, color data (LRV 23.5), 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

BM Duxbury Gray (HC-163) is a mid-tone gray with a green undertone and a calculated LRV of 23.5. Against white trim the contrast ratio is 3.32:1, which gives clear contrast; painted tone-on-tone, the geometric pattern shows only through its shadow lines.

Geometric 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 69.28 m of 2.5 cm molding, or 29 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 geometric pattern

Fix the outer frame, then run diagonals corner to corner. Each diagonal end is cut at the frame's angle; measure it once per frame size and reuse the cut.

Painting molding in BM Duxbury 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

BM Duxbury Gray wall, tone-on-tone trim, geometric layout on a 15 ft wall. Colors are screen approximations.

Color data

ColorBrandCodeHexCalculated LRVUndertoneDepthContrast vs white trimContrast vs black trim
BM Duxbury GrayBenjamin MooreHC-163#80878023.5greenmid-tone3.32:14.47:1

Trim color pairings

PairingTrim colorHexContrastEffect
tone-on-toneBM Duxbury Gray#8087801:1Trim painted the same color as the wall
matching whiteBM Chantilly Lace#F4F6F13.39:1White with the closest undertone
contrastWhite#F4F3EE3.32:1Light trim for crisp contrast

Living Room wall sizes: geometric 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 in55.27 m242
15 ft531.2 in50 / 21 in69.28 m292
18 ft631.3 in50 / 21 in83.28 m352

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
Frame sides (upper row)1050 in
Frame top and bottom (upper row)1031.2 in
Diagonal pieces2037.6 in
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.

Modern Geometric Wainscoting Design Wall Molding Kit, Ready to Assemble | Pre-Cut & Primed01 / KIT

Modern Geometric Wainscoting Design Wall Molding Kit, Ready to Assemble | Pre-Cut & Primed

From $103.00

View kit
Geometric Chevron Accent Wall Molding Kit, Pre-Cut | Easy Installation02 / KIT

Geometric Chevron Accent Wall Molding Kit, Pre-Cut | Easy Installation

From $232.74

View kit
Geometric Asymmetric Wall Molding Kit, Easy Installation for Living Areas | Pre-Cut & Primed03 / KIT

Geometric Asymmetric Wall Molding Kit, Easy Installation for Living Areas | Pre-Cut & Primed

From $202.00

View kit

Questions

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

About 69.28 m (227 linear ft) including a chair rail and 10% waste, which is 29 sticks of 240 cm. That assumes 5 frames per row, 31.2 in wide, on an 8 ft ceiling.

Is BM Duxbury Gray warm or cool?

BM Duxbury Gray has a green undertone and reads as a mid-tone gray. Its calculated LRV is 23.5, so it absorbs light, so tone-on-tone molding reads as deep relief.

Should trim be the same color as BM Duxbury Gray walls?

Painting the molding the same color gives a modern, tone-on-tone finish where only shadows show the pattern. White trim adds clear contrast (3.32:1), and black trim gives 4.47:1.

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