Simply Posh vs Undercool
Simply Posh is a Behr color while Undercool comes from Sherwin-Williams. These are both blues, so the question isn't which hue to choose — it's where within blue to land. At LRV 49 vs 43, Undercool will read as the brighter of the two — a 6-point gap that matters most in north-facing or low-light rooms. The tonal difference — Simply Posh's blue character against Undercool's cool — becomes most visible against white trim or in morning light. At ΔE 6.8, the difference is perceptible but not dramatic — the two can work harmoniously in the same space. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
Simply Posh vs Undercool Simulated Comparison
5 simulated room previews — drag the slider on each to see Simply Posh 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 Simply Posh comparisons
See how Simply Posh stacks up against other well-photographed colors across different brands and tones.
