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Sherwin-Williams SW-2739 / Light & depth

Charcoal Blue in Daylight and Evening Light: What Changes Matter?

Judge Charcoal Blue under the light you actually use, rather than expecting one constant screen appearance. Its LRV is 6; the key concern is a nearly black blue for defined architectural areas .

Color guide · Updated September 23, 2026

Sitting room with muted blue walls, warm wood and cream upholstery

Follow the room through its ordinary day

Judge Charcoal Blue under the light you actually use, rather than expecting one constant screen appearance. Its LRV is 6; the key concern is a nearly black blue for defined architectural areas . Charcoal Blue's low reflectance places it among the nearly black navy choices, not among light or medium blues.

Why the white shelves and warm oak relationship matters

White shelving can make the dark shape readable, while warm oak prevents the scheme from relying entirely on a blue-and-white contrast.

Charcoal Blue has an LRV of 6; Sherwin-Williams Sea Serpent SW-7615 is 7. The difference is 1 points, with Sea Serpent returning more light under the reference measurement.

Keep the surroundings in the test

For Charcoal Blue, inspect the darkest painted position with the ordinary lamps alone. Then compare a better-lit part of the same board. Decide whether the low-light silhouette is desirable; buying stronger bulbs solely to reproduce a daylight photograph may change the whole atmosphere of the room.

A lighting result needs a practical decision

Decide whether black-like depth is welcome in the darkest corner; a navy name does not guarantee obvious blue everywhere. The undertones and neighboring colors covers that related choice. The physical-sample checklist covers that related choice.

Record the condition that made Charcoal Blue least convincing as well as its best view. If only a short period of daylight works, change the color or the room plan rather than ignoring the hours when the space is occupied. The north-facing room assessment covers that related choice. Before ordering samples, compare room-planning features in the paint color visualizer roundup.

Sources & notes

Color specifications: Sherwin-Williams Charcoal Blue SW-2739. The recorded LRV is 6. Named comparison values come from the respective manufacturers; material schemes are editorial suggestions.

This guide reviews published color information and proposes practical sample checks. It does not claim first-hand paint testing or customer-review scores. Sherwin-Williams does not sponsor or endorse this site. Product names and trademarks belong to their respective owners. Confirm the color in a physical sample and select the coating for the actual surface and finish.