#1B4E81#1B4E81

#1B4E81 is a dark, moderate cyan. Relative luminance 0.073; OKLCH L 41.7% C 0.101 H 251.6°. Best body text is #FFFFFF at 8.56:1 contrast (WCAG AA passes).

Color values

HEX	#1B4E81
RGB	rgb(27, 78, 129)
HSL	hsl(210, 65%, 31%)
HSV	hsv(210, 79%, 51%)
CMYK	cmyk(79.1%, 39.5%, 0%, 49.4%)
CIE-LAB	lab(32.40, 2.30, -33.53)
CIE-LCH	lch(32.40, 33.61, 273.93°)
OKLab	oklab(41.74% -0.0318 -0.0956)
OKLCH	oklch(41.74% 0.101 251.6)
XYZ	xyz(7.1373, 7.2659, 21.7909)
Luminance	0.0727 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4E81 #814E1B

analogous

#1B8181 #1B4E81 #1B1B81

triadic

#1B4E81 #811B4E #4E811B

tetradic

#1B4E81 #811B81 #814E1B #1B811B

square

#1B4E81 #811B81 #814E1B #1B811B

split-complementary

#1B4E81 #811B1B #81811B

monochromatic

#06111C #102F4E #1B4E81 #266DB4 #3F8BD7

Accessibility & contrast

On white

8.56

#1B4E81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#1B4E81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4E81

8.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4E81	#FFFFFF	#000000	##FFFFFF
##1B4E81	1.00	8.56	2.45	8.56
#FFFFFF	8.56	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#365183

Deuteranopia (green-blind)

#264880

Tritanopia (blue-blind)

#005A61

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1b4e81;
/* rgb */ color: rgb(27, 78, 129);
/* oklch */ color: oklch(41.7% 0.101 251.6);

Tailwind

colors: {
  custom: {
    50: '#677fa6',
    500: '#1b4e81',
    950: '#000000',
  },
}

SCSS

$custom: #1b4e81;
$custom-light: #677fa6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4e81",
  "rgb": {
    "r": 27,
    "g": 78,
    "b": 129
  },
  "hsl": {
    "h": 210,
    "s": 65.385,
    "l": 30.588
  },
  "oklch": {
    "l": 0.41736,
    "c": 0.10078,
    "h": 251.6
  },
  "luminance": 0.07267
}

Semantic roles & 50–950 ramp

primary

#1B4E81

secondary

#B57C43

accent

#943FE8

background

#F6F7FA

surface

#EBEEF4

border

#C6C9CE

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #1B4E81

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

Preview Lab → · Contrast checker → · Palette generator →