DecoMoldings

inspiration · Picture Frame

SW Colonnade Gray Staircase Wall Molding

SW Colonnade Gray Staircase Wall Molding: wall elevation, color data (LRV 53.1), staircase layout for 8, 12, 16 ft walls, cut list, calculator and pre-cut kit

Catalog snapshot View 2 sources ↓

Project calculator

Wall molding linear-foot estimate

Estimate for rectangular molding frames.

Estimated quantity109.08 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 Colonnade Gray is a light gray with a warm (yellow) undertone and a calculated LRV of 53.1. Against white trim the contrast ratio is 1.63:1, which gives soft contrast; painted tone-on-tone, the picture frame pattern shows only through its shadow lines.

Picture Frame layout on a 12 ft staircase wall

Molding over the full wall height, upper and lower rows divided by a chair rail. On a 12 ft wall with an 8 ft ceiling this gives 5 frames per row, each 24 in wide, with 50 in upper and 21 in lower frames. The layout uses about 37.27 m of 2.5 cm molding, or 16 sticks of 240 cm, including 10% waste. Frames follow the stair angle: keep the bottom rail parallel to the stringer.

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 Colonnade 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

SW Colonnade Gray wall, tone-on-tone trim, picture frame layout on a 12 ft wall. Colors are screen approximations.

Color data

ColorBrandCodeHexCalculated LRVUndertoneDepthContrast vs white trimContrast vs black trim
SW Colonnade GraySherwin-Williams#C6C0B653.1warm (yellow)light1.63:19.12:1

Trim color pairings

PairingTrim colorHexContrastEffect
tone-on-toneSW Colonnade Gray#C6C0B61:1Trim painted the same color as the wall
matching whiteSW Greek Villa#F0ECE21.53:1White with the closest undertone
contrastBlack#1F1F1F9.12:1Dark trim for a graphic outline

Staircase wall sizes: picture frame accent wall layout

Wall widthFrames per rowFrame widthFrame height (upper / lower)Molding incl. 10% waste240 cm sticksChair rail pieces (300 cm)
8 ft326.7 in50 / 21 in23.53 m101
12 ft524 in50 / 21 in37.27 m162
16 ft627.3 in50 / 21 in47.5 m202

Cut list for a 12 ft wall

Planning cut list
PieceQuantityLength
Frame top and bottom (lower row)1024 in
Frame sides (lower row)1021 in
Frame sides (upper row)1050 in
Frame top and bottom (upper row)1024 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.

Nested Accent Wall Molding Kit, 3 Upper & 3 Bottom Nested Frames | Easy Installation01 / KIT

Nested Accent Wall Molding Kit, 3 Upper & 3 Bottom Nested Frames | Easy Installation

From $180.00

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Picture Frame Wall Molding Kit, 2 Upper & 2 Bottom Frames | Easy Installation02 / KIT

Picture Frame Wall Molding Kit, 2 Upper & 2 Bottom Frames | Easy Installation

From $75.00

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Shadow Box Contemporary Wall Molding Kit, Easy Assembly for Living Room Areas03 / KIT

Shadow Box Contemporary Wall Molding Kit, Easy Assembly for Living Room Areas

From $240.00

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French Accent Wall Trim Molding Kit, Picture Frame Paneling | Easy Installation04 / KIT

French Accent Wall Trim Molding Kit, Picture Frame Paneling | Easy Installation

From $232.74

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Shadow Box Ready to Assemble Wall Molding Package, 2 Upper, 1 Center & 2 Bottom Frames | Easy Installation05 / KIT

Shadow Box Ready to Assemble Wall Molding Package, 2 Upper, 1 Center & 2 Bottom Frames | Easy Installation

From $157.00

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Flexible Arched Wall Molding, Paintable MDF Wall Trim, Pre-Cut Arch Decorative Wall Panels | Picture Frame Molding, Accent Wall Trim06 / 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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Questions

How much molding do I need for a 12 ft staircase wall with picture frame frames?

About 37.27 m (122 linear ft) including a chair rail and 10% waste, which is 16 sticks of 240 cm. That assumes 5 frames per row, 24 in wide, on an 8 ft ceiling.

Is SW Colonnade Gray warm or cool?

SW Colonnade Gray has a warm (yellow) undertone and reads as a light gray. Its calculated LRV is 53.1, so it sits in the mid range, where molding shadows show clearly.

Should trim be the same color as SW Colonnade 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 (1.63:1), and black trim gives 9.12:1.

How high should the chair rail be in a staircase?

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. Frames follow the stair angle: keep the bottom rail parallel to the stringer.

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