Valspar Shadow Mountain#666B89 · LRV 15
Shadow Mountain reads as a blue / cool — dark — high drama, needs strong daylight or warm bulbs. The notes below cover the spec, what Valspar 8003-48E actually looks like under different light, and the closest matches at competing US brands.
Color spec
| Brand | Valspar |
| Name | Shadow Mountain |
| SKU | 8003-48E |
| Hex | #666B89 |
| RGB | 102, 107, 137 |
| HSL | 231°, 15%, 47% |
| LRV | 15 |
| Undertone | blue / cool |
| Family | Gray |
About Valspar Shadow Mountain
With an LRV of 15, Shadow Mountain is a deep, dramatic shade. It soaks up light in north-facing rooms and looks richest where strong daylight hits it. Its blue undertone is the part to watch: it gets picked up by whatever sits next to it, so test it against your trim, floor and the room's main light before committing. Warm artificial light softens it; cool LED can make it look flat, so match your bulbs to the mood you want.
Shadow Mountain works best as a feature — a single wall, built-ins, a study or dining room — rather than wrapping a whole bright space. Grays like this read as a modern neutral and sit comfortably alongside both warm woods and cool metals.
Kompozit alternative
The closest hex in the Kompozit deck, ranked by ΔE2000 (perceptual color difference). ΔE under 2 is indistinguishable to most eyes; under 5 is a very close visual match.
Closest matches at every US brand
9 brands · top 5 each5 closest matches per brand by ΔE2000, computed against each brand's full deck. Tap any swatch for its full single-color spec; tap the brand title to browse all gray from that brand.
Benjamin Moore
Dunn-Edwards
PPG / Glidden
Farrow & Ball
Behr
Clare
Sherwin-Williams
Backdrop
Similar Valspar colors
closest in the Valspar deckThe nearest shades to Shadow Mountain within Valspar's own range, ranked by perceptual color distance — useful when you want the same look a touch lighter, darker, or warmer.
Coordinated palette
Generated by hue-rotating #666B89 in HSL space. Pair Shadow Mountain with one accent and one neutral — the swatches below are starting points, not final picks.
Accessibility (WCAG contrast)
WCAG 2.1: AA = 4.5:1 normal text · AA Large = 3:1 large text · AAA = 7:1 normal text.