St. Lucia Skies vs Undercool
Where St. Lucia Skies belongs to Benjamin Moore's range, Undercool is a Sherwin-Williams color. Both sit in the blue family, which is useful context if you're narrowing within a single hue direction. They have nearly identical light reflectance values (47 vs 49), so they'll read as similarly Medium in most lighting conditions. St. Lucia Skies runs blue while Undercool is decidedly cool, which means they'll respond very differently to warm vs cool light sources. At ΔE 2.8, these are close — the kind of difference that matters when choosing between them, but doesn't read strongly in a finished room. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
St. Lucia Skies vs Undercool Simulated Comparison
5 simulated room previews — drag the slider on each to see St. Lucia Skies on one side and Undercool on the other.
Digital color is approximate. These simulations are generated from the manufacturer's hex values and overlaid on grayscale room photos — your screen's calibration, brightness, and viewing angle all affect how they render. Before committing to either color, test physical samples in your own space under the light you actually live with.
More St. Lucia Skies comparisons
See how St. Lucia Skies stacks up against other well-photographed colors across different brands and tones.
