#1B4571#1B4571

#1B4571 is a dark, moderate cyan. Relative luminance 0.057; OKLCH L 38.4% C 0.088 H 252.1°. Best body text is #FFFFFF at 9.83:1 contrast (WCAG AA passes).

Color values

HEX	#1B4571
RGB	rgb(27, 69, 113)
HSL	hsl(211, 61%, 27%)
HSV	hsv(211, 76%, 44%)
CMYK	cmyk(76.1%, 38.9%, 0%, 55.7%)
CIE-LAB	lab(28.59, 1.88, -29.58)
CIE-LCH	lch(28.59, 29.64, 273.64°)
OKLab	oklab(38.45% -0.0272 -0.0842)
OKLCH	oklch(38.45% 0.088 252.1)
XYZ	xyz(5.5596, 5.6809, 16.4231)
Luminance	0.0568 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4571 #71471B

analogous

#1B7071 #1B4571 #1C1B71

triadic

#1B4571 #711B45 #45711B

tetradic

#1B4571 #711B70 #71471B #1B711C

square

#1B4571 #711B70 #71471B #1B711C

split-complementary

#1B4571 #711C1B #70711B

monochromatic

#060F19 #0F2740 #1B4571 #2763A2 #3781CF

Accessibility & contrast

On white

9.83

#1B4571 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#1B4571 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4571

9.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4571	#FFFFFF	#000000	##FFFFFF
##1B4571	1.00	9.83	2.14	9.83
#FFFFFF	9.83	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#314873

Deuteranopia (green-blind)

#244070

Tritanopia (blue-blind)

#004F55

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1b4571;
/* rgb */ color: rgb(27, 69, 113);
/* oklch */ color: oklch(38.4% 0.088 252.1);

Tailwind

colors: {
  custom: {
    50: '#64789a',
    500: '#1b4571',
    950: '#000000',
  },
}

SCSS

$custom: #1b4571;
$custom-light: #64789a;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4571",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 113
  },
  "hsl": {
    "h": 210.698,
    "s": 61.429,
    "l": 27.451
  },
  "oklch": {
    "l": 0.38447,
    "c": 0.08849,
    "h": 252.1
  },
  "luminance": 0.05682
}

Semantic roles & 50–950 ramp

primary

#1B4571

secondary

#A67542

accent

#9643E5

background

#F6F7F9

surface

#EBEDF2

border

#C6C8CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #1B4571

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

Preview Lab → · Contrast checker → · Palette generator →