#1B4155#1B4155

#1B4155 is a dark, muted cyan. Relative luminance 0.047; OKLCH L 35.7% C 0.055 H 234.3°. Best body text is #FFFFFF at 10.86:1 contrast (WCAG AA passes).

Color values

HEX	#1B4155
RGB	rgb(27, 65, 85)
HSL	hsl(201, 52%, 22%)
HSV	hsv(201, 68%, 33%)
CMYK	cmyk(68.2%, 23.5%, 0%, 66.7%)
CIE-LAB	lab(25.77, -6.40, -16.01)
CIE-LCH	lch(25.77, 17.24, 248.22°)
OKLab	oklab(35.73% -0.0323 -0.0448)
OKLCH	oklch(35.73% 0.055 234.3)
XYZ	xyz(3.9814, 4.6691, 9.2840)
Luminance	0.0467 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4155 #552F1B

analogous

#1B554C #1B4155 #1B2455

triadic

#1B4155 #551B41 #41551B

tetradic

#1B4155 #4C1B55 #552F1B #24551B

square

#1B4155 #4C1B55 #552F1B #24551B

split-complementary

#1B4155 #551B24 #554C1B

monochromatic

#071217 #0C1D27 #1B4155 #2A6583 #3988B2

Accessibility & contrast

On white

10.86

#1B4155 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1B4155 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4155

10.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4155	#FFFFFF	#000000	##FFFFFF
##1B4155	1.00	10.86	1.93	10.86
#FFFFFF	10.86	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#374056

Deuteranopia (green-blind)

#2F3A55

Tritanopia (blue-blind)

#004648

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1b4155;
/* rgb */ color: rgb(27, 65, 85);
/* oklch */ color: oklch(35.7% 0.055 234.3);

Tailwind

colors: {
  custom: {
    50: '#5e7585',
    500: '#1b4155',
    950: '#000000',
  },
}

SCSS

$custom: #1b4155;
$custom-light: #5e7585;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4155",
  "rgb": {
    "r": 27,
    "g": 65,
    "b": 85
  },
  "hsl": {
    "h": 200.69,
    "s": 51.786,
    "l": 21.961
  },
  "oklch": {
    "l": 0.35731,
    "c": 0.05524,
    "h": 234.3
  },
  "luminance": 0.04669
}

Semantic roles & 50–950 ramp

primary

#1B4155

secondary

#8B5A41

accent

#7E4DDB

background

#F5F7F8

surface

#E9EDEF

border

#C5C8CA

text

#05080B

muted

#797B7C

Preview Lab

Preview with #1B4155

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →