#1B4E83#1B4E83

#1B4E83 is a dark, moderate cyan. Relative luminance 0.073; OKLCH L 41.9% C 0.104 H 252.4°. Best body text is #FFFFFF at 8.52:1 contrast (WCAG AA passes).

Color values

HEX	#1B4E83
RGB	rgb(27, 78, 131)
HSL	hsl(211, 66%, 31%)
HSV	hsv(211, 79%, 51%)
CMYK	cmyk(79.4%, 40.5%, 0%, 48.6%)
CIE-LAB	lab(32.52, 3.11, -34.58)
CIE-LCH	lch(32.52, 34.72, 275.13°)
OKLab	oklab(41.87% -0.0313 -0.0987)
OKLCH	oklch(41.87% 0.104 252.4)
XYZ	xyz(7.2716, 7.3196, 22.4979)
Luminance	0.0732 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4E83 #83501B

analogous

#1B8283 #1B4E83 #1C1B83

triadic

#1B4E83 #831B4E #4E831B

tetradic

#1B4E83 #831B82 #83501B #1B831C

square

#1B4E83 #831B82 #83501B #1B831C

split-complementary

#1B4E83 #831C1B #82831B

monochromatic

#06121E #113050 #1B4E83 #256CB6 #418BD8

Accessibility & contrast

On white

8.52

#1B4E83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#1B4E83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4E83

8.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4E83	#FFFFFF	#000000	##FFFFFF
##1B4E83	1.00	8.52	2.46	8.52
#FFFFFF	8.52	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#355285

Deuteranopia (green-blind)

#244882

Tritanopia (blue-blind)

#005B62

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1b4e83;
/* rgb */ color: rgb(27, 78, 131);
/* oklch */ color: oklch(41.9% 0.104 252.4);

Tailwind

colors: {
  custom: {
    50: '#687fa7',
    500: '#1b4e83',
    950: '#000000',
  },
}

SCSS

$custom: #1b4e83;
$custom-light: #687fa7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4e83",
  "rgb": {
    "r": 27,
    "g": 78,
    "b": 131
  },
  "hsl": {
    "h": 210.577,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.41868,
    "c": 0.10354,
    "h": 252.4
  },
  "luminance": 0.0732
}

Semantic roles & 50–950 ramp

primary

#1B4E83

secondary

#B67E43

accent

#963FE9

background

#F6F7FA

surface

#EBEEF4

border

#C6C9CE

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #1B4E83

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

Preview Lab → · Contrast checker → · Palette generator →