#1B4B83#1B4B83

#1B4B83 is a dark, moderate cyan. Relative luminance 0.069; OKLCH L 41.1% C 0.107 H 254.6°. Best body text is #FFFFFF at 8.82:1 contrast (WCAG AA passes).

Color values

HEX	#1B4B83
RGB	rgb(27, 75, 131)
HSL	hsl(212, 66%, 31%)
HSV	hsv(212, 79%, 51%)
CMYK	cmyk(79.4%, 42.7%, 0%, 48.6%)
CIE-LAB	lab(31.59, 5.11, -36.07)
CIE-LCH	lch(31.59, 36.43, 278.06°)
OKLab	oklab(41.14% -0.0285 -0.1031)
OKLCH	oklch(41.14% 0.107 254.6)
XYZ	xyz(7.0633, 6.9030, 22.4285)
Luminance	0.0690 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4B83 #83531B

analogous

#1B7F83 #1B4B83 #1F1B83

triadic

#1B4B83 #831B4B #4B831B

tetradic

#1B4B83 #831B7F #83531B #1B831F

square

#1B4B83 #831B7F #83531B #1B831F

split-complementary

#1B4B83 #831F1B #7F831B

monochromatic

#06111E #112E50 #1B4B83 #2568B6 #4186D8

Accessibility & contrast

On white

8.82

#1B4B83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#1B4B83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4B83

8.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4B83	#FFFFFF	#000000	##FFFFFF
##1B4B83	1.00	8.82	2.38	8.82
#FFFFFF	8.82	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#304F85

Deuteranopia (green-blind)

#1E4682

Tritanopia (blue-blind)

#005860

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1b4b83;
/* rgb */ color: rgb(27, 75, 131);
/* oklch */ color: oklch(41.1% 0.107 254.6);

Tailwind

colors: {
  custom: {
    50: '#687ca7',
    500: '#1b4b83',
    950: '#000000',
  },
}

SCSS

$custom: #1b4b83;
$custom-light: #687ca7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4b83",
  "rgb": {
    "r": 27,
    "g": 75,
    "b": 131
  },
  "hsl": {
    "h": 212.308,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.41136,
    "c": 0.10701,
    "h": 254.6
  },
  "luminance": 0.06904
}

Semantic roles & 50–950 ramp

primary

#1B4B83

secondary

#B68143

accent

#9A3FE9

background

#F6F7FA

surface

#EBEEF4

border

#C6C9CE

text

#07090F

muted

#7A7B7F

Preview Lab

Preview with #1B4B83

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

Preview Lab → · Contrast checker → · Palette generator →