Begin with the weaker light
Niebla Azul can be assessed for a north-facing room, but the direction alone cannot determine the result. Its LRV is 53; the key concern is blue in both the sunlit wall and the shaded return . Niebla Azul has more reflectance than deep slate blues yet enough body to be a visible light-blue wall.
Why the warm linen and natural wood relationship matters
Natural wood and warm linen provide a reason to inspect both sunlit and shaded views rather than decide from a single cool-looking photo.
Niebla Azul has an LRV of 53; Sherwin-Williams Sleepy Blue SW-6225 is 58. The difference is 5 points, with Sleepy Blue returning more light under the reference measurement.
Keep the surroundings in the test
Assess Niebla Azul against the actual warm and cool materials in the shaded room. A blue or green appearance may be exactly the point, or it may conflict with the brief. The compass direction is background information; the particular window, view and material boundary establish the useful test.
A lighting result needs a practical decision
Check that the shaded wall retains an appealing blue before carrying it into an adjoining room. The situations that call for another color covers that related choice.
Window size, obstruction and season still matter when choosing Niebla Azul. A compass direction is not a brightness measurement. In the Northern Hemisphere, north-facing daylight is often less directly sunlit; the actual room remains the test. The daylight and evening-light checks covers that related choice. Before ordering samples, compare room-planning features in the paint color visualizer roundup.
Sources & notes
Color specifications: Sherwin-Williams Niebla Azul SW-9137. The recorded LRV is 53. 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.