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Sherwin-Williams SW-9139 / Color character

Debonair Undertones: What to Compare Beside Your Finishes

Debonair is a cool blue softened by slate gray. A physical comparison is needed to decide how that character works with your own finishes.

Color guide · Updated September 23, 2026

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

Start with the documented color character

Debonair is a cool blue softened by slate gray. A physical comparison is needed to decide how that character works with your own finishes. Debonair occupies a middle ground between pale slate blues and near-black navies.

Why the cream walls and brushed brass relationship matters

Cream walls allow blue millwork to become the architectural color, with brass used as a smaller highlight rather than the main contrast.

Debonair has an LRV of 34; Sherwin-Williams Stardew SW-9138 is 43. The difference is 9 points, with Stardew returning more light under the reference measurement. Stardew is a balanced slate blue with a medium reflectance value. This supplies a named color control; the LRV gap alone does not identify the warmer, greener or pinker paint.

Use Stardew as a control

With Debonair, identify the hue you want to retain rather than trying to eliminate all undertones. Place the sample with cream walls and brushed brass and compare Stardew. A blue-green, rosy or earthy paint may need a different color direction if its defining character is unwelcome.

Separate a persistent cast from a comparison effect

Review the blue on a vertical panel from across the room; use its medium depth to separate the millwork. The warm-versus-cool comparison covers that related choice.

If the unwanted cast remains beside a permanent finish under normal light, that is a practical reason to replace Debonair. If it appears only beside an unused sample, remove the comparison and assess the intended palette alone. Before ordering samples, compare room-planning features in the paint color visualizer roundup.

Sources & notes

Color specifications: Sherwin-Williams Debonair SW-9139. The recorded LRV is 34. 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.