BLUES
Tetsu-Kon Blue
#17184B
Tetsu-Kon Blue is #17184B in HEX — rgb(23, 24, 75), hsl(239°, 53%, 19%), cmyk(69%, 68%, 0%, 71%).
Tetsu-Kon Blue pulls into the deep end of the blues spectrum — HSL 239°, 53%, 19%. 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
RAL
Ultramarine Blue 5002
Behr
Blackberry Harvest S-H-660
Benjamin Moore
Blue 2066-10
Dulux
Kellands Pond NZ10F6
Vista Paint
Hot Sauna C-1270
Hallman-Lindsay
Newport Indigo historic-newport-indigo
Dunn-Edwards
Cobalt DEA140
Dutch Boy
Royal Blue D-6740
Sherwin-Williams
Dewberry SW6552
Kilz
Renaissance Tapestry RH240
Valspar
Spirit Blue 4011-9
PPG
Daring Indigo 1166-7 · 13-25
Colorhouse
Petal .05 Petal-05
Kobra
Blue 31
IKEA
IKEA122 122
Farrow & Ball
Pelt 254
Light Reflectance & Undertone
Light Reflectance Value (LRV)
1/100
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 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
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
Tetsu-Kon 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: #17184B;background-color: #17184B;--color-tetsu-kon-blue: #17184B;colors: { 'tetsu-kon-blue': '#17184B' }bg-[#17184B] text-[#17184B]$tetsu-kon-blue: #17184B;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 #17184B?
#17184B is Tetsu-Kon Blue, a near-black blue with a cool undertone.
Is #17184B warm or cool?
Tetsu-Kon Blue reads cool, which influences how it interacts with surrounding tones and natural light.
What rooms work best with Tetsu-Kon Blue?
Tetsu-Kon Blue works well in bedrooms, bathrooms, home offices. Designers typically use it for main walls, ceilings, trim, cabinetry.
What colors pair well with Tetsu-Kon Blue?
Tetsu-Kon 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 Tetsu-Kon Blue?
You can download Tetsu-Kon 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 Tetsu-Kon Blue?
The hex code is #17184B. In RGB it's 23, 24, 75, and in HSL it's 239°, 53%, 19%.
