DecoMoldings

inspiration · Picture Frame

F&B French Gray Staircase Wall Molding

F&B French Gray Staircase Wall Molding: wall elevation, color data (LRV 43.6), staircase layout for 8, 12, 16 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 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

F&B French Gray is a light green with a green undertone and a calculated LRV of 43.6. Against white trim the contrast ratio is 1.94:1, 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 F&B French Gray

Greens are the most popular color for tone-on-tone molding walls: the shadows of the frames add depth without breaking the color.

Wall elevation

F&B French 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
F&B French GrayFarrow & Ball#B5B19A43.6greenlight1.94:17.63:1

Trim color pairings

PairingTrim colorHexContrastEffect
tone-on-toneF&B French Gray#B5B19A1:1Trim painted the same color as the wall
matching whiteCream#F2E8D21.77:1White with the closest undertone
contrastWhite#F4F3EE1.94:1Light trim for crisp contrast

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 Frame Nursery Wall Molding Kit, Ready to Assemble | 3 Upper & 3 Bottom Nested Frames01 / KIT

Nested Frame Nursery Wall Molding Kit, Ready to Assemble | 3 Upper & 3 Bottom Nested Frames

From $250.00

View kit
DIY Hassle-Free Board & Batten Wall Makeovers | Pre-Cut MDF Panels for Easy Installation W:75mm x T:8mm02 / KIT

DIY Hassle-Free Board & Batten Wall Makeovers | Pre-Cut MDF Panels for Easy Installation W:75mm x T:8mm

From $515.00

View kit
Minimalist Flat Picture Frame Wall Molding Kit | Self-Adhesive Easy Installation03 / KIT

Minimalist Flat Picture Frame Wall Molding Kit | Self-Adhesive Easy Installation

From $186.00

View kit
Chair Rail Half Wall Wainscoting Kit, 6 cm Rail | Self-Adhesive Easy Installation04 / KIT

Chair Rail Half Wall Wainscoting Kit, 6 cm Rail | Self-Adhesive Easy Installation

From $39.41

View kit
Entryway Accent Picture Frame Molding Set, 1 to 5 Panels Kits | Easy Installation05 / KIT

Entryway Accent Picture Frame Molding Set, 1 to 5 Panels Kits | Easy Installation

From $51.25

View kit
Half Wall Wainscoting Kit with 4 cm Chair Rail | Self-Adhesive Easy Installation06 / KIT

Half Wall Wainscoting Kit with 4 cm Chair Rail | Self-Adhesive Easy Installation

From $33.41

View kit

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 F&B French Gray warm or cool?

F&B French Gray has a green undertone and reads as a light green. Its calculated LRV is 43.6, so it sits in the mid range, where molding shadows show clearly.

Should trim be the same color as F&B French 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 7.63:1.

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