BLUES
Firmament Blue
#11353F
Firmament Blue is #11353F in HEX — rgb(17, 53, 63), hsl(193°, 58%, 16%), cmyk(73%, 16%, 0%, 75%).
Firmament Blue pulls into the deep end of the blues spectrum — HSL 193°, 58%, 16%. 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
Paint Matches — this color across 16 brands
Sherwin-Williams
Dark Night SW6237
Behr
Night Shade 740F-7
RAL
Green Blue 5001
Dulux
Cool Current S33A9
Benjamin Moore
Hidden CSP-690
Vista Paint
Puerto Deseado K-160
Hallman-Lindsay
Atlantic Waves 473
PPG
Sailor's Coat 1153-7
Colorhouse
Nourish .06 Nourish-06
Dunn-Edwards
Deep Ocean DEA135
Kilz
Night Magic RM230
Farrow & Ball
Hague Blue 30
Valspar
Everglade Deck 5011-3
IKEA
IKEA186 186
Kobra
Black 44
Dutch Boy
Dark Green D-6751
Light Reflectance & Undertone
Light Reflectance Value (LRV)
3/100
Very Dark
Absorbs almost all light — dramatic and cocooning. Needs strong artificial lighting and works best as an accent or in well-lit rooms.
Undertone
Reads as a cool teal with a green undertone showing through, especially in daylight. Pair trim and adjacent colours to either calm or amplify that undertone.
Color Theory
Complementary
Analogous
Triadic
Split-Complementary
Tetradic
Monochromatic
Rectangle
Compound
Variations
Lighter
Darker
Saturation
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)
Deuteranopia
Protanopia
Tritanopia
Color Psychology
Focused · Cooling
Firmament 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.
How it looks under different light
Pairs With
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
color: #11353F;background-color: #11353F;--color-firmament-blue: #11353F;colors: { 'firmament-blue': '#11353F' }bg-[#11353F] text-[#11353F]$firmament-blue: #11353F;Similar Colors
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 #11353F?
#11353F is Firmament Blue, a near-black blue with a cool undertone.
Is #11353F warm or cool?
Firmament Blue reads cool, which influences how it interacts with surrounding tones and natural light.
What rooms work best with Firmament Blue?
Firmament Blue works well in bedrooms, bathrooms, home offices. Designers typically use it for main walls, ceilings, trim, cabinetry.
What colors pair well with Firmament Blue?
Firmament 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 Firmament Blue?
You can download Firmament 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 Firmament Blue?
The hex code is #11353F. In RGB it's 17, 53, 63, and in HSL it's 193°, 58%, 16%.
