Paint colors · Benjamin Moore, as published by the brand

Dark Harbor CSP-720 from Benjamin Moore: hex #1E4850, LRV and undertone

Dark Harbor (CSP-720) from Benjamin Moore is #1E4850 with an LRV of 7.72. It measures as a cool-leaning blue-green, and white text on it reaches 10.00:1.

By Paul Gunder. Every value is computed from published standards; see how ColorPlum works.

Updated November 11, 2026

Benjamin MooreDark HarborCSP-720

Hex: #1E4850
RGB: 30, 72, 80
LRV: 7.72
Undertone: Blue-green, cool-leaning

LRV 7.72. Very dark: close to black on the wall; use where you want drama or contrast.

A clear blue-green color (OKLCH hue 212°, chroma 0.048), not a neutral.

Coordinating colors Benjamin Moore suggests

Sylvan MistCSP-740
Porch SwingCSP-750
Cloud CoverOC-25
Salisbury GreenHC-139

Closest colors from other brands

ΔE is the CIEDE2000 difference between the published values: under 2 is hard to tell apart on a wall, 2 to 5 is a visible but related shade. Always compare real chips before you buy.

Name, code, LRV and color value as published by Benjamin Moore on its color page (checked 2026-11-11). A screen can only approximate paint: sheen, lighting and the screen itself all change it, so check a physical sample. ColorPlum is not affiliated with Benjamin Moore.

ColorPlum swatchDark Harbordark, soft cyan

HEX: #1E4850
RGB: rgb(30, 72, 80)
HSL: hsl(190, 45%, 22%)

Best text on it: white at 10.00:1

Build a palette Make a gradient Check contrast Wallpaper

Dark Harbor#1E4850

Every code for Dark Harbor

HEX#1E4850
RGBrgb(30, 72, 80)
HSLhsl(190, 45%, 22%)
HSV190°, 63%, 31%
CMYK62%, 10%, 0%, 69%
Lablab(27.9% -13.2 -9.5)
OKLCHoklch(37.5% 0.048 211.8)
Decimal1984592

Tints, shades and tones

From white to black in 10% steps, with Dark Harbor in the middle. Tap a code to copy it.

90%#E9EDEE
80%#D2DADC
70%#BCC8CB
60%#A5B6B9
50%#8FA4A8
40%#789196
30%#627F85
20%#4B6D73
10%#355A62
Base#1E4850
10%#1B4148
20%#183A40
30%#153238
40%#122B30
50%#0F2428
60%#0C1D20
70%#091618
80%#060E10
90%#030708

Tones (mixed with gray)

10%#284E55
20%#32535A
30%#3B595E
40%#455E63
50%#4F6468
60%#596A6D
70%#636F72
80%#6C7576
90%#767A7B

Matching colors

Complementary

#1E4850
#50261E

Analogous

#1E503F
#1E4850
#1E2F50

Triadic

#1E4850
#501E48
#48501E

Split complementary

#1E4850
#501E2F
#503F1E

Tetradic (square)

#1E4850
#3F1E50
#50261E
#2F501E

Monochromatic

#060D0F
#091618
#1E4850
#337A88
#4BAABC

Dark Harbor in 3D color space

OKLab, the space ColorPlum does its math in: lightness runs up the pole, hue goes around it and saturation grows outward. The faint shell is every color a screen can show (saturation is drawn wider than lightness so hues separate). Drag to turn it.

Dark Harbor with its complement, its triad and its tint and shade

Dark Harbor
Triad #501E48
Triad #48501E
Complement
50% tint
50% shade

Dark Harbor in use

New collectionAutumn edit

Card body text stays dark for reading; dark harbor carries the header and the button.

Shop nowTag

Headline in Dark Harbor

A paragraph with a link set in this color, which is dark enough for text on white.

How it looks with color-vision deficiency

A simulation (Machado and colleagues, 2009) of how the color and its complement read without one type of cone.

Typical color vision#1E4850
Protanopia (no red cones)#424650
Deuteranopia (no green cones)#3A4050
Tritanopia (no blue cones)#004B4A

Contrast and readability

Pairing	Ratio	WCAG 2.2
as text on white	10.00:1	AA AA large AAA
as text on black	2.09:1	AA AA large AAA
white text on it	10.00:1	AA AA large AAA
black text on it	2.09:1	AA AA large AAA
on your background	8.73:1	AA AA large AAA

Try a background

Export

:root {
  --dark-harbor: #1e4850;
  --dark-harbor-rgb: 30 72 80;
  --dark-harbor-on: #ffffff;
}

On this page

Dark Harbor is Benjamin Moore CSP-720, a deep teal-leaning color at hex #1E4850 and RGB 30, 72, 80. Blue and green channels are close, with red far behind, which is what pulls it to blue-green rather than navy.

The numbers

HSL is hsl(190, 45%, 22%), Lab is lab(27.9% -13.2 -9.5) and OKLCH is oklch(37.5% 0.048 211.8). The chroma of 0.048 means this is not a neutral: the undertone field calls it a clear blue-green, cool-leaning, at a hue of 212 degrees. The negative a and b values in Lab confirm green and blue pulling together.

LRV is 7.72, which the scale files under very dark: on a wall it behaves almost like black. It is a color for drama and contrast, and its saturation reads more strongly in daylight than in lamplight, where it settles toward charcoal.

Worked example

Think of a powder room with no window, a white pedestal sink and brass fixtures. Painting all four walls Dark Harbor makes the space feel like a deliberate jewel box, and since the LRV is 7.72 the wall will not reflect much from the sconces, so choose generous bulbs. Benjamin Moore lists Sylvan Mist (CSP-740), Porch Swing (CSP-750), Cloud Cover (OC-25) and Salisbury Green (HC-139) as coordinating colors. This site has no pages for those, so use their codes. Cloud Cover would suit a ceiling or trim in a room this dark, and Sylvan Mist could appear on a vanity or in an adjoining hall.

Other deep colors in the file

Among Benjamin Moore entries, Stained Glass (CSP-685) is ΔE 10.3, Essex Green (HC-188) 11.6 and Vermont Slate (1673) 11.7. All three are clearly different.

Cross-brand the closest are Sherwin-Williams Deep Sea Dive (SW 7618) at 8.4, Naval (SW 6244) at 10.5, Iron Ore (SW 7069) at 14.9 and Forestwood (SW 7730) at 15.9. Every one is over 5, so none replaces Dark Harbor. Colors this dark vary a lot between samples, so painting a large board of your candidates is worth the effort.

Text on #1E4850

White text measures 10.00:1 against this hex, well past the 4.5:1 body requirement, and black text manages only 2.09:1. Use white for any heading, button or label placed on this background. To test other pairings, try the contrast grid.

Deep colors like this one reward careful prep: a tinted primer, two full coats and good light while you work. Without them the finish can look patchy where the roller overlaps, and the cool blue-green may pick up streaks in side light.