Valspar Blue Thunder#637A80 · LRV 18
Blue Thunder reads as a blue-green / cool — dark — high drama, needs strong daylight or warm bulbs. The notes below cover the spec, what Valspar 8004-37F actually looks like under different light, and the closest matches at competing US brands.
Color spec
| Brand | Valspar |
| Name | Blue Thunder |
| SKU | 8004-37F |
| Hex | #637A80 |
| RGB | 99, 122, 128 |
| HSL | 192°, 13%, 45% |
| LRV | 18 |
| Undertone | blue-green / cool |
| Family | Teal |
About Valspar Blue Thunder
With an LRV of 18, Blue Thunder is a deep, dramatic shade. It soaks up light in north-facing rooms and looks richest where strong daylight hits it. Its teal 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.
Blue Thunder works best as a feature — a single wall, built-ins, a study or dining room — rather than wrapping a whole bright space. Teals add character without shouting — good for a vanity, an island or a feature wall.
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 teal from that brand.
Sherwin-Williams
Benjamin Moore
PPG / Glidden
Behr
Farrow & Ball
Magnolia Home
Dunn-Edwards
Backdrop
Clare
Similar Valspar colors
closest in the Valspar deckThe nearest shades to Blue Thunder 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 #637A80 in HSL space. Pair Blue Thunder 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.