GREENS
Blue Lagoon
#409CAC
Blue Lagoon is #409CAC in HEX — rgb(64, 156, 172), hsl(189°, 46%, 46%), cmyk(63%, 9%, 0%, 33%).
Blue Lagoon pulls into the mid-tone end of the greens spectrum — HSL 189°, 46%, 46%. The balanced saturation makes it confident without overpowering, and the hue reads cool. In interior projects it shines on bedrooms, bathrooms, libraries — for grounding, restorative spaces. Reads best alongside soft white walls, oak floors, brass, warm clay accents.
Color Codes
Paint Matches — this color across 16 brands
Light Reflectance & Undertone
Light Reflectance Value (LRV)
28/100
Medium
Balanced reflectance — holds colour without washing out. Versatile for most rooms and the most forgiving range for true-to-chip results.
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
Shades & Tints
Shades and tints of Blue Lagoon run from a pale tint down to a deep shade — same hue and saturation, lightness stepped. Each rung below shows its exact HEX code; tap any to copy it.
Variations
Lighter
Darker
Saturation
Interior Use
Best Rooms
bedrooms, bathrooms, libraries
Best Uses
main walls, cabinetry, soft furniture
Pairs With
soft white walls, oak floors, brass, warm clay accents
Accessibility (WCAG)
Deuteranopia
Protanopia
Tritanopia
Color Psychology
Calm · Restorative
Blue Lagoon sits in the part of the spectrum the eye relaxes into. Designers reach for green when a room needs to feel like a refuge — bedrooms, libraries, bathrooms — because it lowers visual blood-pressure without flattening the space.
How it looks under different light
Pairs With
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
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: #409CAC;background-color: #409CAC;--color-blue-lagoon: #409CAC;colors: { 'blue-lagoon': '#409CAC' }bg-[#409CAC] text-[#409CAC]$blue-lagoon: #409CAC;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 #409CAC?
#409CAC is Blue Lagoon, a mid-tone green with a cool undertone.
Is #409CAC warm or cool?
Blue Lagoon reads cool, which influences how it interacts with surrounding tones and natural light.
What rooms work best with Blue Lagoon?
Blue Lagoon works well in bedrooms, bathrooms, libraries. Designers typically use it for main walls, cabinetry, soft furniture.
What colors pair well with Blue Lagoon?
Blue Lagoon pairs naturally with soft white walls, oak floors, brass, warm clay accents. Its complementary color is also a strong contrast option for accents.
Where can I download Blue Lagoon?
You can download Blue Lagoon 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 Blue Lagoon?
The hex code is #409CAC. In RGB it's 64, 156, 172, and in HSL it's 189°, 46%, 46%.