Resolute Blue vs Undercool
Resolute Blue and Undercool come from the same Sherwin-Williams collection. These are both blues, so the question isn't which hue to choose — it's where within blue to land. The 9-point LRV gap — 49 for Undercool vs 40 for Resolute Blue — means Undercool will open up a space more effectively. Both share a cool character, which means they'll respond to light and surrounding materials in similar ways. ΔE 10.0 means they're clearly different, but not dramatically so — they'd pair well in the same 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
Resolute Blue vs Undercool Simulated Comparison
5 simulated room previews — drag the slider on each to see Resolute Blue 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 Resolute Blue comparisons
See how Resolute Blue stacks up against other well-photographed colors across different brands and tones.
At LRV 83 vs 40, White Dove is decisively the brighter choice.
Ammonite reflects far more light (LRV 69 vs 40), opening up a space where Resolute Blue encloses it.
At LRV 40 vs 6, Resolute Blue is decisively the brighter choice.
Purbeck Stone reads slightly lighter (LRV 52 vs 40), a gap that shows most in low-lit rooms.
Resolute Blue reads slightly lighter (LRV 40 vs 30), a gap that shows most in low-lit rooms.
A 12-point LRV gap (52 vs 40) makes Mizzle the marginally brighter of the two.
Agreeable Gray reflects far more light (LRV 60 vs 40), opening up a space where Resolute Blue encloses it.
At LRV 58 vs 40, Accessible Beige is decisively the brighter choice.
At LRV 40 vs 27, Resolute Blue is decisively the brighter choice.
French Gray reads slightly lighter (LRV 43 vs 40), a gap that shows most in low-lit rooms.
Resolute Blue reflects far more light (LRV 40 vs 4), opening up a space where Naval encloses it.
At LRV 55 vs 40, Tranquil Dawn is decisively the brighter choice.
At LRV 40 vs 13, Resolute Blue is decisively the brighter choice.
A 4-point LRV gap (44 vs 40) makes Hardwick White the marginally brighter of the two.
Pure White reflects far more light (LRV 84 vs 40), opening up a space where Resolute Blue encloses it.
Resolute Blue reflects far more light (LRV 40 vs 21), opening up a space where Artichoke encloses it.
At LRV 66 vs 40, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 40, Shoji White is decisively the brighter choice.
At LRV 83 vs 40, Snowbound is decisively the brighter choice.
At LRV 40 vs 12, Resolute Blue is decisively the brighter choice.
At LRV 68 vs 40, Skimming Stone is decisively the brighter choice.
With LRVs of 41 and 40, the two reflect almost the same amount of light.
Calamine reflects far more light (LRV 68 vs 40), opening up a space where Resolute Blue encloses it.
Resolute Blue reflects far more light (LRV 40 vs 25), opening up a space where Treron encloses it.
At LRV 40 vs 12, Resolute Blue is decisively the brighter choice.
A 5-point LRV gap (45 vs 40) makes Saybrook Sage the marginally brighter of the two.
Resolute Blue reads slightly lighter (LRV 40 vs 31), a gap that shows most in low-lit rooms.
Resolute Blue reflects far more light (LRV 40 vs 7), opening up a space where Pine Needle encloses it.
Resolute Blue reflects far more light (LRV 40 vs 24), opening up a space where Cement grey encloses it.
Guilford Green reflects far more light (LRV 57 vs 40), opening up a space where Resolute Blue encloses it.