DecoMoldings

inspiration · Picture Frame

SW Inkwell Wainscoting

SW Inkwell Wainscoting: wall elevation, color data (LRV 3.6), 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 quantity50.93 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 Inkwell is a very dark gray with a violet undertone and a calculated LRV of 3.6. Against white trim the contrast ratio is 10.99:1, which gives strong, graphic contrast; painted tone-on-tone, the picture frame pattern shows only through its shadow lines.

Picture Frame layout on a 15 ft living room wall

Molding on the lower third of the wall under a chair rail; the upper wall stays plain. On a 15 ft wall with an 8 ft ceiling this gives 6 frames per row, each 25.3 in wide, 21 in tall. The layout uses about 20.56 m of 2.5 cm molding, or 9 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 picture frame pattern

Each frame is four pieces of 2.5 cm molding with 45 degree miters. Set the frames out from the center of the wall, keep every gap equal, and let the margins at the corners match the gaps.

Painting molding in SW Inkwell

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 Inkwell wall, tone-on-tone trim, picture frame layout on a 15 ft wall. Colors are screen approximations.

Color data

ColorBrandCodeHexCalculated LRVUndertoneDepthContrast vs white trimContrast vs black trim
SW InkwellSherwin-Williams#31363A3.6violetvery dark10.99:11.35:1

Trim color pairings

PairingTrim colorHexContrastEffect
tone-on-toneSW Inkwell#31363A1:1Trim painted the same color as the wall
matching whiteBM Chantilly Lace#F4F6F111.22:1White with the closest undertone
contrastWhite#F4F3EE10.99:1Light trim for crisp contrast

Living Room wall sizes: picture frame wainscoting layout

Wall widthFrames per rowFrame widthFrame height (upper / lower)Molding incl. 10% waste240 cm sticksChair rail pieces (300 cm)
12 ft524 in21 in16.6 m72
15 ft625.3 in21 in20.56 m92
18 ft726.3 in21 in24.53 m112

Cut list for a 15 ft wall

Planning cut list
PieceQuantityLength
Frame top and bottom (lower row)1225.3 in
Frame sides (lower row)1221 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.

Half Wall Arched Wainscoting Panels Kit | Pre-Cut MDF Easy Installation01 / KIT

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

From $73.60

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French Picture Frame Wainscoting Wall Molding Kit | Self-Adhesive Easy Installation02 / KIT

French Picture Frame Wainscoting Wall Molding Kit | Self-Adhesive Easy Installation

From $189.70

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Peel and Stick Wainscoting Accent Wall Molding Kit, 2 to 4 Panels | Easy Installation03 / KIT

Peel and Stick Wainscoting Accent Wall Molding Kit, 2 to 4 Panels | Easy Installation

From $47.12

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Board and Batten Wall Kit, Shaker Grid 1 to 5 Sets | Self-Adhesive Wainscoting04 / KIT

Board and Batten Wall Kit, Shaker Grid 1 to 5 Sets | Self-Adhesive Wainscoting

From $69.80

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Half Wall Ready to Assemble Factory Primed Wall Covering Half of Wall Kit | Easy Installation W:74mm T:10mm05 / KIT

Half Wall Ready to Assemble Factory Primed Wall Covering Half of Wall Kit | Easy Installation W:74mm T:10mm

From $415.00

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Vertical Wainscoting Wall Molding Kit, 3 Vertical Frames | Self-Adhesive Easy Installation06 / KIT

Vertical Wainscoting Wall Molding Kit, 3 Vertical Frames | Self-Adhesive Easy Installation

From $90.00

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Questions

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

About 20.56 m (67 linear ft) including a chair rail and 10% waste, which is 9 sticks of 240 cm. That assumes 6 frames per row, 25.3 in wide, on an 8 ft ceiling.

Is SW Inkwell warm or cool?

SW Inkwell has a violet undertone and reads as a very dark gray. Its calculated LRV is 3.6, so it absorbs light, so tone-on-tone molding reads as deep relief.

Should trim be the same color as SW Inkwell walls?

Painting the molding the same color gives a modern, tone-on-tone finish where only shadows show the pattern. White trim adds strong, graphic contrast (10.99:1), and black trim gives 1.35:1.

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