BLUES

Mountain Vale

#646B8F

RGB 100, 107, 143 · HSL 230°, 18%, 48% · CMYK 30, 25, 0, 44

Mountain Vale is #646B8F in HEX — rgb(100, 107, 143), hsl(230°, 18%, 48%), cmyk(30%, 25%, 0%, 44%).

Mountain Vale pulls into the mid-tone end of the blues spectrum — HSL 230°, 18%, 48%. The neutral saturation makes it near-neutral and forgiving, and the hue reads cool. In interior projects it shines on bedrooms, bathrooms, home offices — for calm, focused environments. Reads best alongside warm white trim, oak or walnut, brass or matte black hardware.

Color Codes

HEX#646B8F

RGB100, 107, 143

HSL230°, 18%, 48%

HSV230°, 30%, 56%

CMYK30, 25, 0, 44

Decimal6581135

CSS RGBrgb(100, 107, 143)

CSS HSLhsl(230, 18%, 48%)

Paint Matches — this color across 16 brands

Vista Paint

Mountain Vale K-81

Exact match

Dulux

Indigo Night S42D6

ΔE 1.3 · #686D92

Dunn-Edwards

Champion Blue DE5915

ΔE 2.4 · #606788

Farrow & Ball

Pitch Blue 220

ΔE 2.6 · #636E8F

PPG

Wild Wisteria 1170-6

ΔE 2.9 · #686B93

Kilz

Blueberry Sauce RB110-01

ΔE 3.1 · #646A93

Benjamin Moore

Blue 825 · CC-860

ΔE 3.6 · #5C6E93

Behr

Plush Velvet N100-5

ΔE 3.7 · #6E6E8E

Valspar

Karmic Grape 4002-8C

ΔE 4.4 · #5D6084

RAL

Pigeon Blue 5014

ΔE 4.6 · #606E8C

Hallman-Lindsay

Blue Jacket 591

ΔE 6 · #597193

Sherwin-Williams

Luxe Blue SW6537

ΔE 7.2 · #516582

IKEA

IKEA122 122

ΔE 13.3 · #3A5170

Kobra

Violet 24

ΔE 16.9 · #9B8CB5

Dutch Boy

Ocean Blue D-6743

ΔE 18.6 · #4C6A74

Colorhouse

Wool .06 Wool-06

ΔE 18.7 · #485761

Light Reflectance & Undertone

Light Reflectance Value (LRV)

15/100

Dark

0 · DarkLight · 100

Soaks up light and feels moody and intimate. Great for studies, dining rooms and accent walls; pair with ample lighting.

Undertone

TemperatureCool MasstoneBlue UndertoneViolet

Reads as a cool blue with a violet undertone showing through, especially in daylight. Pair trim and adjacent colours to either calm or amplify that undertone.

Color Theory

Complementary

#646B8F

#908964

Analogous

#648290

#646B8F

#736490

Triadic

#646B8F

#90646C

#6C9064

Split-Complementary

#646B8F

#907364

#829064

Tetradic

#646B8F

#906482

#908964

#649073

Monochromatic

#262836

#454A63

#646B8F

#9095B2

#BDC0D1

Rectangle

#646B8F

#896490

#908964

#6C9064

Compound

#646B8F

#736490

#908964

#829064

Variations

Lighter

#8288A8

#A3A7BC

#CBCDD6

Darker

#4F5674

#363A51

#1F222F

Saturation

#747681

#646C90

#324AC3

Interior Use

Best Rooms

bedrooms, bathrooms, home offices

Best Uses

main walls, ceilings, trim, cabinetry

Pairs With

warm white trim, oak or walnut, brass or matte black hardware

Accessibility (WCAG)

vs White

5.20:1

vs Black

4.04:1

AA Large

Deuteranopia

#646B8F

#616D8F

Original → Simulated

Protanopia

#646B8F

#6A6A8B

Original → Simulated

Tritanopia

#646B8F

#60726D

Original → Simulated

Color Psychology

Focused · Cooling

Mountain Vale lowers the temperature of a room — useful in south-facing rooms that overheat visually, and in home offices where you want a clear head. Pair with warm wood and brass to keep it from reading clinical.

SymbolismTrust, depth, stability

PersonalityClear-headed, dependable, contemplative

focustrustcalmofficebedroomdepth

How it looks under different light

#8A7D86

Warm Bulb 2700K

Incandescent / soft white LED — pulls colour toward yellow/amber.

#646B8F

Daylight 5500K

Midday natural light or daylight-spec LED — closest to the paint chip.

#7882AB

Cool Bulb 6500K

Cool white LED / overcast daylight — pulls colour toward blue.

Pairs With

#EAEAEB

Trim

Matched off-white

Same hue at 92% lightness — trim reads coordinated, not stark.

#F7F7F7

Ceiling

Whisper tint

Near-white with a hint of the hero's undertone — ceiling feels intentional.

#82794E

Accent

Complementary punch

Hue +180°, slightly muted for paint vs. screen — use on a door, frame, or single piece.

#574738

Floor

Walnut neutral

Warm mid-brown grounds the scheme regardless of hero hue.

Paint Info

Brand · Product Line

Benjamin Moore / Regal Select Interior

Recommended Finishes

Eggshell (walls) · Pearl (trim) · Matte (ceiling)

Eggshell hides imperfections on main walls while keeping the color rich; pearl on trim adds subtle sheen and easier cleaning; flat matte on ceilings prevents glare.

Best Surfaces

Primary walls · Cabinetry · Doors · Mouldings

Coverage & Dry Time

Typical coverage 350-400 sq ft per gallon over a primed surface.

Touch-dry in ~1 hour. Recoat after 4 hours. Full cure 7-14 days.

Primer

Standard primer is adequate.

Application Tip

Use a 9" microfiber roller on walls and a 2.5" angled sash brush for trim cuts. Two coats minimum for even depth.

Paint Calculator

Wall area (m²)

Coats

Coverage (m² / L)

You'll need

4.0 litres

1.06 US gallons · room for one touch-up coat. Buy slightly more to ensure single-batch match.

Code Snippets

CSS — color

color: #646B8F;

CSS — background

background-color: #646B8F;

CSS Variable

--color-mountain-vale: #646B8F;

Tailwind v3 — config

colors: { 'mountain-vale': '#646B8F' }

Tailwind — arbitrary

bg-[#646B8F] text-[#646B8F]

SCSS

$mountain-vale: #646B8F;

Similar Colors

Blue Nova

#5B6D92 · ΔE 3.6

Blue Heron

#5C6A85 · ΔE 6.2

French Violet

#696D86 · ΔE 6.6

Darkest Grape

#5C5A7C · ΔE 7.1

Fancy Pants

#53618F · ΔE 7.7

Nile Blue

#4E719A · ΔE 8.7

Yin Yang

#6A82A8 · ΔE 9.7

Queen's Wreath

#7C819D · ΔE 10.1

Built by DSGN.HOUSE Updated 2026

Our color tools run on our own catalogue of 26,000+ real paint colors across 16 brands — Benjamin Moore, Sherwin-Williams, Behr, Dulux, RAL and more — with the color math (HSL and CIELAB matching) computed in-house, not scraped from summaries. Every color you pick maps to a real, buyable paint with its code, so what you see here you can actually take to the store. We review and update these tools and their data regularly.

Created by Denis Kataev, founder of DSGN.HOUSE — a software engineer and digital entrepreneur building professional color-design tools for everyone.

Frequently Asked Questions

What color is #646B8F?

#646B8F is Mountain Vale, a mid-tone blue with a cool undertone.

Is #646B8F warm or cool?

Mountain Vale reads cool, which influences how it interacts with surrounding tones and natural light.

What rooms work best with Mountain Vale?

Mountain Vale works well in bedrooms, bathrooms, home offices. Designers typically use it for main walls, ceilings, trim, cabinetry.

What colors pair well with Mountain Vale?

Mountain Vale pairs naturally with warm white trim, oak or walnut, brass or matte black hardware. Its complementary color is also a strong contrast option for accents.

Where can I download Mountain Vale?

You can download Mountain Vale on DSGN.HOUSE in 15 designer formats including CSS gradient, Figma, Procreate swatches, Tailwind config, Adobe ASE, SVG, and 4K wallpapers — all free.

What's the hex code for Mountain Vale?

The hex code is #646B8F. In RGB it's 100, 107, 143, and in HSL it's 230°, 18%, 48%.

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