DecoMoldings

inspiration · Arched

SW Oyster Bay Arched Wall Molding

SW Oyster Bay Arched Wall Molding: wall elevation, color data (LRV 44.1), living room layout for 12, 15, 18 ft walls, cut list, calculator and pre-cut kits.

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

SW Oyster Bay is a light gray with a green undertone and a calculated LRV of 44.1. Against white trim the contrast ratio is 1.92:1, 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 SW Oyster Bay

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

Wall elevation

SW Oyster Bay 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
SW Oyster BaySherwin-Williams#AEB3A944.1greenlight1.92:17.71:1

Trim color pairings

PairingTrim colorHexContrastEffect
tone-on-toneSW Oyster Bay#AEB3A91:1Trim painted the same color as the wall
matching whiteBM Simply White#F7F7EE1.98:1White with the closest undertone
contrastWhite#F4F3EE1.92:1Light 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.

U Shaped Arch Wall Trim Molding Kit | Pre-Cut MDF Medium & Large01 / KIT

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

From $81.40

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Flexible Arched Wall Molding, Paintable MDF Wall Trim, Pre-Cut Arch Decorative Wall Panels | Picture Frame Molding, Accent Wall Trim02 / KIT

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

From $73.60

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Arched Accent Wall Trim Molding Kit, 3 Widths | Pre-Cut MDF03 / KIT

Arched Accent Wall Trim Molding Kit, 3 Widths | Pre-Cut MDF

From $58.40

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Double Arched Wall Molding Set | Pre-Cut MDF Decorative Wall Panels04 / KIT

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

From $133.60

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Arch Molding Kit, 3 Widths | Flexible Pre-Cut MDF Arch Trim for Accent Walls05 / KIT

Arch Molding Kit, 3 Widths | Flexible Pre-Cut MDF Arch Trim for Accent Walls

From $58.40

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Modern Arched Wall Panel Kit: Pre-Cut MDF Wall Molding06 / KIT

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

From $140.00

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 SW Oyster Bay warm or cool?

SW Oyster Bay has a green undertone and reads as a light gray. Its calculated LRV is 44.1, so it sits in the mid range, where molding shadows show clearly.

Should trim be the same color as SW Oyster Bay 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 (1.92:1), and black trim gives 7.71:1.

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