Sailor's Knot (M510-3)

Sailor's Knot (M510-3) is a mid-tone, cool paint color from Behr (#90B1CB, LRV 41.7). See how it shifts in different light, the colors it pairs with, and its closest matches in other brands.

Sailor's Knot (M510-3) is a mid-tone, cool-toned paint color from Behr. It holds its character through the day — steady in both daylight and lamplight. Below you'll see it in real rooms, the colors it pairs with, the finishes that suit it, and its closest matches in other brands — everything you need before you commit a wall to it.

The kind of mid-tone shade that makes a room feel considered rather than accidental — easy to live with, and hard to get wrong.

Sailor's Knot at a glance

Brand: Behr
Color code: M510-3
Hex: #90B1CB
RGB: 144, 177, 203
HSL: 206°, 36%, 68%
LRV (Light Reflectance Value): 41.7 — mid-tone
Undertone: cool undertone leaning blue-green
Color family: light, pastel, cool, blue

How it behaves in light

Sailor's Knot sits in the middle of the range, so it stays fairly steady from morning to night. Watch how its cool undertone shifts between a sunny wall and a shaded one before you decide. The honest test is simple: paint a poster-board sample, move it to the wall you care about, and look at it in the morning, midday, and after dark. Undertones almost always show up more on a full wall than they do on a tiny chip.

Where it works

Sailor's Knot is an easy color to build a home around. Let it carry the main living spaces and keep trim a step lighter in the same warm-or-cool family, so the room feels intentional rather than busy. It flows nicely from an entry through to bedrooms, and it gives deeper accent colors something calm to sit against in dining rooms, studies, and media spaces.

What to pair it with

For a little contrast — a front door, a single accent wall — reach for a color on the opposite side of the wheel. For a calm, flowing palette, stay with its close neighbors so rooms blend gently into one another. And the fastest way to plan trim, walls, and cabinets is to use lighter and deeper versions of Sailor's Knot itself; that built-in range almost always reads as harmonious because it shares the same DNA.

How it compares across brands

No two paint lines mix a color quite the same way, so a "match" from another brand is rarely identical on the wall. We line up the closest options from Sherwin-Williams, Benjamin Moore, Behr, and others and rank them by how close they actually look — not by similar-sounding names. If you're switching an existing palette over to Behr, that ranking is the shortcut: start from the closest match and sample from there.

Before you commit

Sample on two walls — Brush Sailor's Knot on a wall that gets morning light and one that gets afternoon light before you order gallons. Color shifts more than a swatch ever suggests.
Get the trim right — With a deeper wall color, a soft off-white trim keeps the room from feeling heavy or boxed in.
Match the finish to the room — Satin — mid-tones shine in satin — easy to clean with a gentle luster.
Order it by code — Ask for M510-3 at the paint counter. Names drift between fan decks, but the code keeps your touch-ups matching for years.

Sailor's Knot, answered

Is Sailor's Knot warm or cool?

Cool. Sailor's Knot carries a subtle cool base, which keeps it feeling crisp and clean, especially in a well-lit room.

What undertone does Sailor's Knot have?

Blue undertone — feels crisp, best in well-lit rooms. It can read cooler in low light and against warm fixtures — worth sampling on your own wall before you commit.

What is Sailor's Knot's LRV?

41.7.

What trim goes with Sailor's Knot walls?

A lighter, cool-toned off-white trim keeps a wall this deep from feeling boxed in — stay in the same cool family so the two don't fight.

Does Sailor's Knot make a room feel smaller?

Not on its own — depth reads as coziness, not confinement, as long as the room has decent light or a lighter ceiling to balance it. It's the color to reach for when you want a room to feel enveloping rather than expansive.