BLUES

Glass Sapphire

#587B9B

RGB 88, 123, 155 · HSL 209°, 28%, 48% · CMYK 43, 21, 0, 39

Glass Sapphire is #587B9B in HEX — rgb(88, 123, 155), hsl(209°, 28%, 48%), cmyk(43%, 21%, 0%, 39%).

Glass Sapphire pulls into the mid-tone end of the blues spectrum — HSL 209°, 28%, 48%. The muted saturation makes it quiet but present, 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#587B9B

RGB88, 123, 155

HSL209°, 28%, 48%

HSV209°, 43%, 61%

CMYK43, 21, 0, 39

Decimal5798811

CSS RGBrgb(88, 123, 155)

CSS HSLhsl(209, 28%, 48%)

Paint Matches — this color across 16 brands

Dulux

Blue Plate S39D5

ΔE 0.8 · #5B7C9C

Behr

Glass Sapphire PPU14-2

ΔE 1.3 · #587A9C

Vista Paint

Sea of Marma K-122

ΔE 1.8 · #587797

PPG

Blue Beads 1160-5

ΔE 2.4 · #5A809E

Kilz

Ripped Jeans RC250-02

ΔE 2.6 · #507A98

Hallman-Lindsay

Madonna Blue 590

ΔE 3.8 · #5F7799

Dunn-Edwards

Clean Slate DE5880

ΔE 4.1 · #577396

Valspar

Veranda Blue 4004-6B

ΔE 4.8 · #607992

Benjamin Moore

Bedford 1679

ΔE 5.2 · #4F748D

Sherwin-Williams

Searching Blue SW6536

ΔE 5.9 · #6C7F9A

RAL

Pigeon Blue 5014

ΔE 7.6 · #606E8C

IKEA

IKEA086 86

ΔE 8.1 · #748DAC

Farrow & Ball

Cook's Blue 237

ΔE 8.3 · #6A90B4

Kobra

Blue 29

ΔE 14.8 · #1882B4

Dutch Boy

Ocean Blue D-6743

ΔE 14.8 · #4C6A74

Colorhouse

Water .05 Water-05

ΔE 19 · #82979D

Light Reflectance & Undertone

Light Reflectance Value (LRV)

19/100

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

#587B9B

#9D7958

Analogous

#589D9C

#587B9B

#58599D

Triadic

#587B9B

#9D587C

#7C9D58

Split-Complementary

#587B9B

#9D5859

#9D9C58

Tetradic

#587B9B

#9C589D

#9D7958

#599D58

Monochromatic

#212E3B

#3D556C

#587B9B

#86A2BB

#B7C7D7

Rectangle

#587B9B

#79589D

#9D7958

#7C9D58

Compound

#587B9B

#58599D

#9D7958

#9D9C58

Variations

Lighter

#7796B3

#9DB0C2

#C7D1DA

Darker

#45637F

#2F4458

#1B2834

Saturation

#707B85

#587C9D

#2C7DC9

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

4.45:1

AA Large

vs Black

4.72:1

Deuteranopia

#587B9B

#67749C

Original → Simulated

Protanopia

#587B9B

#767697

Original → Simulated

Tritanopia

#587B9B

#55807C

Original → Simulated

Color Psychology

Focused · Cooling

Glass Sapphire 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

#81898F

Warm Bulb 2700K

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

#587B9B

Daylight 5500K

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

#6F8EB4

Cool Bulb 6500K

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

Pairs With

#EAEBEC

Trim

Matched off-white

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

#F7F7F8

Ceiling

Whisper tint

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

#82674E

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: #587B9B;

CSS — background

background-color: #587B9B;

CSS Variable

--color-glass-sapphire: #587B9B;

Tailwind v3 — config

colors: { 'glass-sapphire': '#587B9B' }

Tailwind — arbitrary

bg-[#587B9B] text-[#587B9B]

SCSS

$glass-sapphire: #587B9B;

Similar Colors

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#4E738C · ΔE 5.5

Yin Yang

#6A82A8 · ΔE 6.2

Blue Nose

#63879F · ΔE 6.7

Old Blue Jeans

#6B89A3 · ΔE 6.8

Nile Blue

#4E719A · ΔE 6.8

Finley Blue

#4580A8 · ΔE 7.0

Santa Monica Blue

#3A6E8C · ΔE 7.6

Winter's Eve

#40729C · ΔE 7.7

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 #587B9B?

#587B9B is Glass Sapphire, a mid-tone blue with a cool undertone.

Is #587B9B warm or cool?

Glass Sapphire reads cool, which influences how it interacts with surrounding tones and natural light.

What rooms work best with Glass Sapphire?

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

What colors pair well with Glass Sapphire?

Glass Sapphire 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 Glass Sapphire?

You can download Glass Sapphire 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 Glass Sapphire?

The hex code is #587B9B. In RGB it's 88, 123, 155, and in HSL it's 209°, 28%, 48%.

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