Start with the documented color character
Debonair is a cool blue softened by slate gray. Temperature is a useful description, but neighboring materials can change the impression. 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
Use a warmer and a cooler object already in the room to assess Debonair, keeping their real proportions visible. The target is a coherent relationship with cream walls and brushed brass. Do not assume that every blue behaves alike or that all greens belong on the same side of a temperature label.
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 undertones and neighboring colors covers that related choice.
Judge the temperature description against the full cream walls and brushed brass arrangement. A warm or cool label is a useful starting category; it cannot guarantee that Debonair agrees with every material assigned the same label. The wood-floor pairing guide covers that related choice. 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.

