Ref. #39729C · 570D-6
Neptune Blue
15%LRV Value
Cool (Blue)Undertone
Neptune Blue Technical Profile
What color is Neptune Blue? It's a deep cool blue with the hex code #39729C. Colors similar to Neptune Blue include Benjamin Moore Winter's, Benjamin Moore Chicago Blues, Kilz Triumph Blue. Neptune Blue has a cool (blue) undertone, which affects how it pairs with trim, flooring, and adjacent wall colors. With an LRV of 15, Neptune Blue creates a dramatic, enveloping mood — best on accent walls, dining rooms, and intimate spaces where atmosphere matters more than reflected light. Pair it with cool whites like Chantilly Lace, walnut or rift-cut oak floors, and brushed nickel or polished chrome hardware. Brass accents add warmth for a layered look. Blues stay crisp under 4000K+ cool LEDs. Under 2700K warm bulbs they can read grayer or shift slightly purple — particularly true for mid-tone and saturated blues.
Colors Similar to Neptune Blue
Closest digital match based on color values. Always verify with physical samples.
Recommended Pairings
Colors That Work With Neptune Blue
Timeless pairing with clean white trim and a tonal accent wall
Side Walls
Neptune Blue
#39729C
Accent Wall
Tonal Shift
A warm shift that adds depth without clashing.
#6267A6
Trim & Molding
Pure White
Crisp white trim for a clean, traditional look.
#FFFFFF
Color Palettes for Neptune Blue
Color harmonies based on color theory — each swatch links to the closest matching paint.
Opposite on the color wheel — creates vibrant contrast
Neptune Blue Room Palettes
Color schemes built around this color — each swatch links to the closest matching paint.
Warm & Inviting
Warm tones with cozy appeal — welcoming and comfortable
Cool & Calm
Cool hues with soft contrast — serene and restful
Bold Contrast
Complementary hues with punch — dynamic and striking
Similar Behr Colors
Other Behr colors close to Neptune Blue.
More blue colors from other brands
Cross-brand colors in the blue family — useful when you want a similar look from a different brand.
Neptune Blue — Frequently Asked Questions
What undertone does Neptune Blue have?
Neptune Blue by Behr has a cool (blue) undertone and belongs to the blue color family.
What colors match Neptune Blue from other brands?
The closest matches are Winter's by Benjamin Moore (#41739D), Chicago Blues by Benjamin Moore (#41739D), Triumph Blue by Kilz (#3F73A0). Always verify with physical samples.
What is the LRV of Neptune Blue?
Neptune Blue has an LRV of 15.3, where 0 is pure black and 100 is pure white.
Explore More with Neptune Blue
Related Reading
How to Match Paint Colors Across Brands
The science behind Delta E and CIEDE2000 — find a Behr equivalent of any Sherwin-Williams shade, or a Benjamin Moore alternative when your store is out of stock.
Understanding Paint Color Undertones
Why Neptune Blue's cool (blue) undertone matters more than its surface color — and how to read undertones in any paint chip.