#1B4D83#1B4D83

#1B4D83 is a dark, moderate cyan. Relative luminance 0.072; OKLCH L 41.6% C 0.105 H 253.1°. Best body text is #FFFFFF at 8.62:1 contrast (WCAG AA passes).

Color values

HEX	#1B4D83
RGB	rgb(27, 77, 131)
HSL	hsl(211, 66%, 31%)
HSV	hsv(211, 79%, 51%)
CMYK	cmyk(79.4%, 41.2%, 0%, 48.6%)
CIE-LAB	lab(32.21, 3.77, -35.08)
CIE-LCH	lch(32.21, 35.28, 276.13°)
OKLab	oklab(41.62% -0.0303 -0.1002)
OKLCH	oklch(41.62% 0.105 253.1)
XYZ	xyz(7.2011, 7.1786, 22.4744)
Luminance	0.0718 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4D83 #83511B

analogous

#1B8183 #1B4D83 #1D1B83

triadic

#1B4D83 #831B4D #4D831B

tetradic

#1B4D83 #831B81 #83511B #1B831D

square

#1B4D83 #831B81 #83511B #1B831D

split-complementary

#1B4D83 #831D1B #81831B

monochromatic

#06111E #112F50 #1B4D83 #256BB6 #4189D8

Accessibility & contrast

On white

8.62

#1B4D83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#1B4D83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4D83

8.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4D83	#FFFFFF	#000000	##FFFFFF
##1B4D83	1.00	8.62	2.44	8.62
#FFFFFF	8.62	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#335185

Deuteranopia (green-blind)

#224782

Tritanopia (blue-blind)

#005A61

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1b4d83;
/* rgb */ color: rgb(27, 77, 131);
/* oklch */ color: oklch(41.6% 0.105 253.1);

Tailwind

colors: {
  custom: {
    50: '#687ea7',
    500: '#1b4d83',
    950: '#000000',
  },
}

SCSS

$custom: #1b4d83;
$custom-light: #687ea7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4d83",
  "rgb": {
    "r": 27,
    "g": 77,
    "b": 131
  },
  "hsl": {
    "h": 211.154,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.41623,
    "c": 0.10468,
    "h": 253.1
  },
  "luminance": 0.07179
}

Semantic roles & 50–950 ramp

primary

#1B4D83

secondary

#B67F43

accent

#973FE9

background

#F6F7FA

surface

#EBEEF4

border

#C6C9CE

text

#07090F

muted

#7A7B7F

Preview Lab

Preview with #1B4D83

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

Preview Lab → · Contrast checker → · Palette generator →