Niebla Azul and Sleepy Blue: the documented difference
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. Choose by the material relationship as well as the number. Niebla Azul has more reflectance than deep slate blues yet enough body to be a visible light-blue wall. Sleepy Blue is a light blue described as warm by Sherwin-Williams.
| Color | Brand / code | LRV |
|---|---|---|
| Niebla Azul | Sherwin-Williams SW-9137 | 53 |
| Sleepy Blue | Sherwin-Williams SW-6225 | 58 |
The choice beside warm linen and natural wood
Natural wood and warm linen provide a reason to inspect both sunlit and shaded views rather than decide from a single cool-looking photo.
Set up both candidates with warm linen and natural wood. Use equal-sized boards with the intended finishes and place them in the same orientation. Do not put one directly beside a window and leave the other in shadow. A difference that follows the position rather than the board is a lighting observation, not evidence that the formula changed.
What the comparison can—and cannot—settle
For a second point of reference, Krypton is recorded at LRV 52. The undertones and neighboring colors covers that related choice.
Check that the shaded wall retains an appealing blue before carrying it into an adjoining room. Assess Niebla Azul and Sleepy Blue alone as well as side by side. The unchosen board will not remain in the finished room, and a preference created only by that neighbor may not survive its removal. 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.