The decision for this particular color
Acier can be considered for bathroom if its color and depth suit the space; the first design question is gray millwork that carries more weight than the walls. Acier is deeper than Dorian Gray and lighter than Felted Wool, giving a practical intermediate gray-depth comparison.
Why the cream walls and stainless steel relationship matters
Stainless steel is reflective and changes with the surroundings; a medium-gray cabinet needs to work with it rather than imitate it.
Acier has an LRV of 32; Sherwin-Williams Dorian Gray SW-7017 is 39. The difference is 7 points, with Dorian Gray returning more light under the reference measurement.
Let tile and porcelain set the limits
Put the Acier sample next to the basin, the largest tile and the grout line. Turn on the vanity light and view the sample directly, then in the mirror; reflections can add other colored surfaces to the scene. The cream walls and stainless steel direction is a starting idea, but the bathroom's actual ceramic and stone take priority over an inspiration palette.
Separate the palette from the moisture specification
Review the cabinet face under its actual light so medium gray does not become an unexpectedly dark mass. The undertones and neighboring colors covers that related choice. The daylight and evening-light checks covers that related choice.
Choose a Sherwin-Williams coating appropriate to the bathroom surface and follow the manufacturer's preparation and application guidance. Color SW-9170 does not identify a moisture-control system. Ventilation, substrate condition and the intended finish are separate decisions; approve the color under the real vanity lighting before ordering the full paint quantity. The trim color comparison covers that related choice. Before ordering samples, compare room-planning features in the paint color visualizer roundup.
Sources & notes
Color specifications: Sherwin-Williams Acier SW-9170. The recorded LRV is 32. 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.

