BLUES

Royal Blue

#1D375C

RGB 29, 55, 92 · HSL 215°, 52%, 24% · CMYK 68, 40, 0, 64

Royal Blue is #1D375C in HEX — rgb(29, 55, 92), hsl(215°, 52%, 24%), cmyk(68%, 40%, 0%, 64%).

Royal Blue pulls into the deep end of the blues spectrum — HSL 215°, 52%, 24%. 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#1D375C
RGB29, 55, 92
HSL215°, 52%, 24%
HSV215°, 68%, 36%
CMYK68, 40, 0, 64
Decimal1914716
CSS RGBrgb(29, 55, 92)
CSS HSLhsl(215, 52%, 24%)

Paint Matches — this color across 16 brands

Dutch Boy

Royal Blue D-6740

Exact match

Behr

Peaceful Night 590F-7

ΔE 1.9 · #1D355C

Dulux

Boatswain S41F9

ΔE 3 · #243456

Benjamin Moore

Symphony 2060-10

ΔE 3.2 · #213C5E

RAL

Pearl Night Blue 5026

ΔE 5.7 · #102C54

Vista Paint

Newport Indigo C-1378

ΔE 6.3 · #363F63

Sherwin-Williams

Commodore SW6524

ΔE 7.5 · #25476A

Dunn-Edwards

Magic Night DEA191

ΔE 8.3 · #3A3B5B

Kilz

Indigo RH220

ΔE 8.4 · #314973

Hallman-Lindsay

Newport Indigo historic-newport-indigo

ΔE 8.6 · #313D6C

PPG

Blue Tang 10-32 · 1160-7

ΔE 9.1 · #2A4B6E

Kobra

Blue 31

ΔE 9.5 · #334059

IKEA

IKEA122 122

ΔE 12.3 · #3A5170

Valspar

Spirit Blue 4011-9

ΔE 12.5 · #49456F

Farrow & Ball

Hague Blue 30

ΔE 21.3 · #3D4E57

Colorhouse

Create .06 Create-06

ΔE 22.6 · #5E3D5A

Light Reflectance & Undertone

Light Reflectance Value (LRV)

4/100

Very Dark

0 · DarkLight · 100

Absorbs almost all light — dramatic and cocooning. Needs strong artificial lighting and works best as an accent or in well-lit rooms.

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

#1D375C
#5D431D

Analogous

#1D585D
#1D375C
#231D5D

Triadic

#1D375C
#5D1D38
#385D1D

Split-Complementary

#1D375C
#5D231D
#585D1D

Tetradic

#1D375C
#5D1D58
#5D431D
#1D5D23

Monochromatic

#060C13
#0B1523
#1D375C
#305B97
#4D80C7

Rectangle

#1D375C
#431D5D
#5D431D
#385D1D

Compound

#1D375C
#231D5D
#5D431D
#585D1D

Variations

Lighter

#305B98
#5782BE
#A2B7D4

Darker

#162D4C
#0E1E35
#08121F

Saturation

#343C47
#1D385D
#0F356C

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)

Aa

vs White

11.98:1

AAA

Aa

vs Black

1.75:1

Fail

Deuteranopia

#1D375C
#23355C

Original → Simulated

Protanopia

#1D375C
#343458

Original → Simulated

Tritanopia

#1D375C
#153E39

Original → Simulated

Color Psychology

Focused · Cooling

Royal 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

#555660

Warm Bulb 2700K

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

#1D375C

Daylight 5500K

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

#425B84

Cool Bulb 6500K

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

Pairs With

#E9EAED

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.

#4B381D

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 / Aura Interior (for richer color depth in deep tones)

Recommended Finishes

Matte (walls) · Pearl (trim) · Satin (doors)

Deep colors look best in matte — gloss exaggerates surface flaws. Reserve subtle sheen for trim, doors, and high-touch areas.

Best Surfaces

Accent walls · Doors · Cabinetry · Built-ins

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

Tinted primer in a similar value is highly recommended — saves a coat and prevents the wall colour from washing the surface.

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

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: #1D375C;
CSS — background 
background-color: #1D375C;
CSS Variable 
--color-royal-blue: #1D375C;
Tailwind v3 — config 
colors: { 'royal-blue': '#1D375C' }
Tailwind — arbitrary 
bg-[#1D375C] text-[#1D375C]
SCSS 
$royal-blue: #1D375C;

Similar Colors

Symphony Blue

#203B5D · ΔE 2.9

Bold Blue

#2B3558 · ΔE 4.3

Admiral Blue

#2B3762 · ΔE 6.0

Downpour Blue

#254669 · ΔE 7.0

Midnight Navy

#333356 · ΔE 7.6

Blue Grotto

#353963 · ΔE 7.7

Marine Blue

#1D3E59 · ΔE 8.3

Wizard

#40466D · ΔE 9.5
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 #1D375C?

#1D375C is Royal Blue, a deep blue with a cool undertone.

Is #1D375C warm or cool?

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

What rooms work best with Royal Blue?

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

What colors pair well with Royal Blue?

Royal 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 Royal Blue?

You can download Royal 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 Royal Blue?

The hex code is #1D375C. In RGB it's 29, 55, 92, and in HSL it's 215°, 52%, 24%.

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