DecoMoldings

inspiration · Arched

BM Simply White Hallway Arched Wall Molding

BM Simply White Hallway Arched Wall Molding: wall elevation, color data (LRV 92.5), hallway layout for 6, 10, 14 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 quantity77.22 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 Simply White (OC-117) is a white with a green undertone and a calculated LRV of 92.5. Against white trim the contrast ratio is 1.03:1, which gives almost no contrast, so the molding reads through shadow alone (a tone-on-tone look); painted tone-on-tone, the arched pattern shows only through its shadow lines.

Arched layout on a 10 ft hallway wall

Molding over the full wall height, upper and lower rows divided by a chair rail. On a 10 ft wall with an 8 ft ceiling this gives 3 frames per row, each 34.7 in wide, with 50 in upper and 21 in lower frames. The layout uses about 25.63 m of 2.5 cm molding, or 11 sticks of 240 cm, including 10% waste. Long, narrow walls suit a repeating rhythm of equal frames.

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 BM Simply White

Whites show molding through shadow only, so side light (a window or wall sconce) brings the pattern out. Use satin on trim and eggshell on the wall to add a slight sheen difference.

Wall elevation

BM Simply White wall, tone-on-tone trim, arched layout on a 10 ft wall. Colors are screen approximations.

Color data

ColorBrandCodeHexCalculated LRVUndertoneDepthContrast vs white trimContrast vs black trim
BM Simply WhiteBenjamin MooreOC-117#F7F7EE92.5greenwhite1.03:115.3:1

Trim color pairings

PairingTrim colorHexContrastEffect
tone-on-toneBM Simply White#F7F7EE1:1Trim painted the same color as the wall
matching whiteBM White Dove#EFEEE51.08:1White with the closest undertone
contrastBlack#1F1F1F15.3:1Dark trim for a graphic outline

Hallway wall sizes: arched accent wall layout

Wall widthFrames per rowFrame widthFrame height (upper / lower)Molding incl. 10% waste240 cm sticksChair rail pieces (300 cm)
6 ft230 in50 / 21 in15.93 m71
10 ft334.7 in50 / 21 in25.63 m112
14 ft437 in50 / 21 in35.33 m152

Cut list for a 10 ft wall

Planning cut list
PieceQuantityLength
Frame top and bottom (lower row)634.7 in
Frame sides (lower row)621 in
Arch frame sides (upper row)632.7 in
Arch top + bottom rail (upper row)334.7 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

View kit
Arched Decorative Wall Molding Panels, 1 to 5 Arches | Pre-Cut MDF02 / KIT

Arched Decorative Wall Molding Panels, 1 to 5 Arches | Pre-Cut MDF

From $146.40

View kit
Double Arched Wall Molding Set | Pre-Cut MDF Decorative Wall Panels03 / KIT

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

From $133.60

View kit
Modern Arched Wall Panel Kit: Pre-Cut MDF Wall Molding04 / KIT

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

From $140.00

View kit
Arched Accent Wall Trim Molding Kit, 3 Widths | Pre-Cut MDF05 / KIT

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

From $58.40

View kit
Flexible Arch Trim Wall Molding Kit | Pre-Cut MDF Decorative Wall Panels06 / KIT

Flexible Arch Trim Wall Molding Kit | Pre-Cut MDF Decorative Wall Panels

From $83.40

View kit

Questions

How much molding do I need for a 10 ft hallway wall with arched frames?

About 25.63 m (84 linear ft) including a chair rail and 10% waste, which is 11 sticks of 240 cm. That assumes 3 frames per row, 34.7 in wide, on an 8 ft ceiling.

Is BM Simply White warm or cool?

BM Simply White has a green undertone and reads as a white white. Its calculated LRV is 92.5, so it reflects a lot of light and keeps molding shadows soft.

Should trim be the same color as BM Simply White walls?

Painting the molding the same color gives a modern, tone-on-tone finish where only shadows show the pattern. White trim adds almost no contrast, so the molding reads through shadow alone (a tone-on-tone look) (1.03:1), and black trim gives 15.3:1.

How high should the chair rail be in a hallway?

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. Long, narrow walls suit a repeating rhythm of equal frames.

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