#1B4E84#1B4E84

#1B4E84 is a dark, moderate cyan. Relative luminance 0.073; OKLCH L 41.9% C 0.105 H 252.8°. Best body text is #FFFFFF at 8.50:1 contrast (WCAG AA passes).

Color values

HEX	#1B4E84
RGB	rgb(27, 78, 132)
HSL	hsl(211, 66%, 31%)
HSV	hsv(211, 80%, 52%)
CMYK	cmyk(79.5%, 40.9%, 0%, 48.2%)
CIE-LAB	lab(32.58, 3.51, -35.10)
CIE-LCH	lch(32.58, 35.27, 275.71°)
OKLab	oklab(41.93% -0.031 -0.1002)
OKLCH	oklch(41.93% 0.105 252.8)
XYZ	xyz(7.3397, 7.3469, 22.8566)
Luminance	0.0735 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4E84 #84511B

analogous

#1B8284 #1B4E84 #1C1B84

triadic

#1B4E84 #841B4E #4E841B

tetradic

#1B4E84 #841B82 #84511B #1B841C

square

#1B4E84 #841B82 #84511B #1B841C

split-complementary

#1B4E84 #841C1B #82841B

monochromatic

#06121E #113051 #1B4E84 #256CB7 #418BD8

Accessibility & contrast

On white

8.50

#1B4E84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#1B4E84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4E84

8.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4E84	#FFFFFF	#000000	##FFFFFF
##1B4E84	1.00	8.50	2.47	8.50
#FFFFFF	8.50	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#345286

Deuteranopia (green-blind)

#234883

Tritanopia (blue-blind)

#005B62

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1b4e84;
/* rgb */ color: rgb(27, 78, 132);
/* oklch */ color: oklch(41.9% 0.105 252.8);

Tailwind

colors: {
  custom: {
    50: '#687fa8',
    500: '#1b4e84',
    950: '#000000',
  },
}

SCSS

$custom: #1b4e84;
$custom-light: #687fa8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4e84",
  "rgb": {
    "r": 27,
    "g": 78,
    "b": 132
  },
  "hsl": {
    "h": 210.857,
    "s": 66.038,
    "l": 31.176
  },
  "oklch": {
    "l": 0.41934,
    "c": 0.10493,
    "h": 252.8
  },
  "luminance": 0.07348
}

Semantic roles & 50–950 ramp

primary

#1B4E84

secondary

#B77F43

accent

#963FE9

background

#F6F7FA

surface

#ECEEF4

border

#C7C9CE

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #1B4E84

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

Preview Lab → · Contrast checker → · Palette generator →