Color spec
| Brand | Behr |
| Name | Neptune Blue |
| SKU | 570D-6 |
| Hex | #39729C |
| RGB | 57, 114, 156 |
| HSL | 205°, 46%, 42% |
| LRV | 15 |
| Undertone | cool blue tone |
| Family | Blue |
About Behr Neptune Blue
With an LRV of 15, Neptune Blue 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.
Neptune Blue works best as a feature — a single wall, built-ins, a study or dining room — rather than wrapping a whole bright space. Blues calm a room, which makes them popular in bedrooms, bathrooms and home offices.
Closest matches by brand
12 brands within ΔE 5The closest matches per brand by ΔE2000, computed against each brand's full deck. Only colors within ΔE 5 (close enough to substitute on a wall) are shown — brands with no real match are left off. Tap any swatch for its full single-color spec; tap the brand title to browse all blue from that brand.
Sherwin-Williams
Benjamin Moore
Valspar
PPG / Glidden
Glidden
Dutch Boy
HGTV Home by Sherwin-Williams
Dunn-Edwards
Diamond Vogel
Hirshfield's
Clare
Kompozit
Similar Behr colors
closest in the Behr deckThe nearest shades to Neptune Blue within Behr'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 #39729C in HSL space. Pair Neptune Blue 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.
Behr Neptune Blue Equivalents at Other Brands
Matching Neptune Blue from a different paint counter? Below is the single closest color in each major US deck and how close it really is. Remember that any paint store can also custom-tint Behr 570D-6 directly — these equivalents are for when you'd rather stay inside one brand's own deck.
Sherwin-Williams Equivalent of Neptune Blue
At Sherwin-Williams, the closest color to Neptune Blue is Danube (SW 6803) — very close at ΔE 3.42, though not an exact twin. It sits at the same lightness (LRV 16 vs 15) and carries a cool blue undertone; sample both side by side if the room gets strong natural light. See the full Danube swatch →
Benjamin Moore Equivalent of Neptune Blue
Benjamin Moore's nearest match is Chicago Blues (804), visually identical in normal room light (ΔE 1.23). It sits at the same lightness (LRV 16 vs 15) and carries a cool blue undertone, so it substitutes for Neptune Blue without repainting risk. See the full Chicago Blues swatch →
Valspar Equivalent of Neptune Blue
Valspar has no exact twin of Neptune Blue. The nearest is In the Mood (V071-5) at ΔE 3.95 — close, but the difference shows next to trim and in side light. It sits at the same lightness (LRV 16 vs 15). Compare large swatches before substituting. See the full In the Mood swatch →
PPG / Glidden Equivalent of Neptune Blue
PPG / Glidden has no exact twin of Neptune Blue. The nearest is Cosmic Dust (PPG1157-6) at ΔE 3.86 — close, but the difference shows next to trim and in side light. It sits at the same lightness (LRV 16 vs 15). Compare large swatches before substituting. See the full Cosmic Dust swatch →
Glidden Equivalent of Neptune Blue
At Glidden, the closest color to Neptune Blue is Cosmic Dust (PPG1157-6) — very close at ΔE 3.41, though not an exact twin. It sits at the same lightness (LRV 16 vs 15) and carries a cool blue undertone; sample both side by side if the room gets strong natural light. See the full Cosmic Dust swatch →
Dutch Boy Equivalent of Neptune Blue
At Dutch Boy, the closest color to Neptune Blue is Lovely Lapis (140-6DB) — very close at ΔE 2.2, though not an exact twin. It sits at the same lightness (LRV 14 vs 15) and carries a cool blue undertone; sample both side by side if the room gets strong natural light. See the full Lovely Lapis swatch →
HGTV Home by Sherwin-Williams Equivalent of Neptune Blue
At HGTV Home by Sherwin-Williams, the closest color to Neptune Blue is Blue Clematis (HGSW 1372) — very close at ΔE 3.42, though not an exact twin. It sits at the same lightness (LRV 16 vs 15) and carries a cool blue undertone; sample both side by side if the room gets strong natural light. See the full Blue Clematis swatch →
Dunn-Edwards Equivalent of Neptune Blue
At Dunn-Edwards, the closest color to Neptune Blue is Postwar Boom (DET584) — very close at ΔE 2.88, though not an exact twin. It sits at the same lightness (LRV 16 vs 15) and carries a cool blue undertone; sample both side by side if the room gets strong natural light. See the full Postwar Boom swatch →
Diamond Vogel Equivalent of Neptune Blue
Diamond Vogel has no exact twin of Neptune Blue. The nearest is Big Ocean Wave (H056) at ΔE 4.02 — close, but the difference shows next to trim and in side light. It sits at the same lightness (LRV 15 vs 15). Compare large swatches before substituting. See the full Big Ocean Wave swatch →
Hirshfield's Equivalent of Neptune Blue
Hirshfield's has no exact twin of Neptune Blue. The nearest is Peninsula (0654) at ΔE 3.97 — close, but the difference shows next to trim and in side light. It runs slightly lighter (LRV 20 vs 15). Compare large swatches before substituting. See the full Peninsula swatch →
Clare Equivalent of Neptune Blue
At Clare, the closest color to Neptune Blue is Hyperlink (PNT100-MD-41) — very close at ΔE 2.68, though not an exact twin. It sits at the same lightness (LRV 16 vs 15) and carries a cool blue undertone; sample both side by side if the room gets strong natural light. See the full Hyperlink swatch →
Kompozit Equivalent of Neptune Blue
Kompozit has no exact twin of Neptune Blue. The nearest is Peninsula (0654) at ΔE 3.97 — close, but the difference shows next to trim and in side light. It runs slightly lighter (LRV 17 vs 15). Compare large swatches before substituting. See the full Peninsula swatch →