BLUES

Lothern Blue

#6699CC

RGB 102, 153, 204 · HSL 210°, 50%, 60% · CMYK 50, 25, 0, 20

Lothern Blue is #6699CC in HEX — rgb(102, 153, 204), hsl(210°, 50%, 60%), cmyk(50%, 25%, 0%, 20%).

Lothern Blue pulls into the light end of the blues spectrum — HSL 210°, 50%, 60%. The balanced saturation makes it confident without overpowering, 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#6699CC

RGB102, 153, 204

HSL210°, 50%, 60%

HSV210°, 50%, 80%

CMYK50, 25, 0, 20

Decimal6724044

CSS RGBrgb(102, 153, 204)

CSS HSLhsl(210, 50%, 60%)

Paint Matches — this color across 16 brands

Dulux

Quiet Bay S39G4

ΔE 0.9 · #659ACC

Valspar

Someday 4006-10B

ΔE 2.6 · #6296CD

Kilz

Coast Drive TB-46

ΔE 3.3 · #599ACD

Benjamin Moore

Waterloo CSP-555

ΔE 3.9 · #608FC3

Behr

Come Sail Away MQ4-26

ΔE 4.1 · #5890C6

PPG

Overcast 1242-4

ΔE 5.2 · #73A3D0

Vista Paint

Acappulco Dive C-638

ΔE 5.2 · #68A6DB

Dunn-Edwards

Marina DE5857

ΔE 5.7 · #65A5D5

Hallman-Lindsay

Bashful Blue 611

ΔE 5.7 · #6994CF

Sherwin-Williams

Lobelia SW6809

ΔE 7.8 · #7498BE

Farrow & Ball

Cook's Blue 237

ΔE 9.1 · #6A90B4

RAL

Light Blue 5012

ΔE 10.4 · #3B83BD

IKEA

IKEA086 86

ΔE 12.9 · #748DAC

Kobra

Blue 29

ΔE 13.1 · #1882B4

Dutch Boy

Celestial Horizon DCP-0589

ΔE 16 · #8FA4BF

Colorhouse

Water .05 Water-05

ΔE 26 · #82979D

Light Reflectance & Undertone

Light Reflectance Value (LRV)

30/100

Medium

0 · DarkLight · 100

Balanced reflectance — holds colour without washing out. Versatile for most rooms and the most forgiving range for true-to-chip results.

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

#6699CC

#CC9966

Analogous

#66CCCC

#6699CC

#6666CC

Triadic

#6699CC

#CC6699

#99CC66

Split-Complementary

#6699CC

#CC6666

#CCCC66

Tetradic

#6699CC

#CC66CC

#CC9966

#66CC66

Monochromatic

#264C73

#3973AC

#6699CC

#9FBFDF

#D9E6F2

Rectangle

#6699CC

#9966CC

#CC9966

#99CC66

Compound

#6699CC

#6666CC

#CC9966

#CCCC66

Variations

Lighter

#85ADD6

#A8C2DC

#CFDBE8

Darker

#3A7ABB

#265482

#15314D

Saturation

#8A99A8

#6699CC

#4C99E6

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

3.00:1

AA Large

vs Black

6.99:1

Deuteranopia

#6699CC

#7A91CD

Original → Simulated

Protanopia

#6699CC

#9292C6

Original → Simulated

Tritanopia

#6699CC

#5FA29A

Original → Simulated

Color Psychology

Focused · Cooling

Lothern Blue 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

#8C9FB4

Warm Bulb 2700K

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

#6699CC

Daylight 5500K

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

#79A4D8

Cool Bulb 6500K

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

Pairs With

#E9EBEC

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.

#B7824D

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 · Trim · Soft furniture

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: #6699CC;

CSS — background

background-color: #6699CC;

CSS Variable

--color-lothern-blue: #6699CC;

Tailwind v3 — config

colors: { 'lothern-blue': '#6699CC' }

Tailwind — arbitrary

bg-[#6699CC] text-[#6699CC]

SCSS

$lothern-blue: #6699CC;

Similar Colors

Waterloo

#5F8EC2 · ΔE 4.3

Brazilian Blue

#6E94CC · ΔE 5.1

Nova Scotia Blue

#6BA3D0 · ΔE 5.4

Lazy Sunday

#5E8FB6 · ΔE 7.8

Sailor's Sea Blue

#4A93BE · ΔE 8.1

Bayberry Blue

#3F9DD1 · ΔE 8.7

Mariner's Tale

#6B8DB3 · ΔE 8.8

Blue Lapis

#6289C6 · ΔE 9.3

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 #6699CC?

#6699CC is Lothern Blue, a soft blue with a cool undertone.

Is #6699CC warm or cool?

Lothern Blue reads cool, which influences how it interacts with surrounding tones and natural light.

What rooms work best with Lothern Blue?

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

What colors pair well with Lothern Blue?

Lothern Blue 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 Lothern Blue?

You can download Lothern Blue 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 Lothern Blue?

The hex code is #6699CC. In RGB it's 102, 153, 204, and in HSL it's 210°, 50%, 60%.

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