#1b4540

Color #1b4540

A moderately saturated very dark cyan.

Closest named color Dark Slate Gray #2f4f4f · ΔE 6.94 Nearest Tailwind class teal-900 #0b4f4a · ΔE 4.2

Open in Palette generator Color wheel Color mixer Contrast checker Blindness simulator Gradient

Conversions

HEX

#1b4540

RGB

rgb(27, 69, 64)

HSL

hsl(172.9, 43.7%, 18.8%)

HSV / HSB

hsv(172.9, 60.9%, 27.1%)

CMYK

cmyk(60.9%, 0%, 7.2%, 72.9%)

LAB

lab(26.33, -16.03, -1.41)

LCH

lch(26.33, 16.09, 185.03)

OKLCH

oklch(35.9%, 0.0476, 184.82)

HWB

hwb(172.9, 10.6%, 72.9%)

Harmony colors

Complementary

#451b20

Analogous

#1b452b

#1b4540

#1b3545

Triadic

#1b4540

#401b45

#45401b

Split-complementary

#1b4540

#451b35

#452b1b

Tetradic

#1b4540

#1b2045

#451b20

#45401b

Square

#1b4540

#2b1b45

#451b20

#35451b

Shades

Color #1b4540 mixed toward black.

#163935

#122e2b

#0d2220

#091715

#040b0b

Tints

Color #1b4540 mixed toward white.

#2e766e

#42a89c

#6ac5ba

#9cd8d1

#cdece8

Tones

Color #1b4540 mixed toward gray.

#1e413d

#223e3b

#253a38

#293735

#2c3333

Accessibility

Aa White text on this color

10.65:1

Aa Black text on this color

1.97:1

White text reads better on this background (10.65:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#323241 · ΔE 21.4

Deuteranopia

#302c42 · ΔE 25.3

Tritanopia

#1f4242 · ΔE 3.4

Achromatopsia

#3e3e3e · ΔE 15.6

Left half is the original, right half is the simulated appearance. See all 8 vision types →

Code

CSS

background-color: #1b4540;

Tailwind (arbitrary value)

bg-[#1b4540]

Related colors

Turquoise #40e0d0

Light Sea Green #20b2aa

Medium Turquoise #48d1cc

Aqua #00ffff

Azure #f0ffff

Dark Cyan #008b8b

Frequently asked questions

#1b4540 (#1b4540) is rgb(27, 69, 64) in RGB.

No, #1b4540 is not one of the 216 web-safe colors — for that, every RGB channel would have to be a multiple of 51.

Related tools

Colors

HEX to RGB Converter

Convert any HEX color code to its RGB and HSL equivalents, live, with copy-to-clipboard values.

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Contrast Checker

Check the WCAG contrast ratio between any two colors, live, with AA/AAA pass-fail results.

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Palette Generator

Generate complementary, analogous, triadic, split-complementary, tetradic, square, and monochromatic palettes from any base color.

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Build something with this color

Generate a full palette from #1b4540, or check how it holds up for accessibility.

Generate a palette → Check contrast