#1B4263#1B4263

#1B4263 is a dark, moderate cyan. Relative luminance 0.050; OKLCH L 36.8% C 0.072 H 246.9°. Best body text is #FFFFFF at 10.47:1 contrast (WCAG AA passes).

Color values

HEX	#1B4263
RGB	rgb(27, 66, 99)
HSL	hsl(208, 57%, 25%)
HSV	hsv(208, 73%, 39%)
CMYK	cmyk(72.7%, 33.3%, 0%, 61.2%)
CIE-LAB	lab(26.82, -1.68, -23.45)
CIE-LCH	lch(26.82, 23.51, 265.91°)
OKLab	oklab(36.8% -0.0282 -0.0663)
OKLCH	oklch(36.8% 0.072 246.9)
XYZ	xyz(4.6515, 5.0298, 12.5277)
Luminance	0.0503 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4263 #633C1B

analogous

#1B6360 #1B4263 #1B1E63

triadic

#1B4263 #631B42 #42631B

tetradic

#1B4263 #601B63 #633C1B #1E631B

square

#1B4263 #601B63 #633C1B #1E631B

split-complementary

#1B4263 #631B1E #63601B

monochromatic

#071018 #0E2233 #1B4263 #286293 #3582C3

Accessibility & contrast

On white

10.47

#1B4263 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1B4263 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4263

10.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4263	#FFFFFF	#000000	##FFFFFF
##1B4263	1.00	10.47	2.01	10.47
#FFFFFF	10.47	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#334364

Deuteranopia (green-blind)

#293C62

Tritanopia (blue-blind)

#004A4E

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1b4263;
/* rgb */ color: rgb(27, 66, 99);
/* oklch */ color: oklch(36.8% 0.072 246.9);

Tailwind

colors: {
  custom: {
    50: '#61768f',
    500: '#1b4263',
    950: '#000000',
  },
}

SCSS

$custom: #1b4263;
$custom-light: #61768f;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4263",
  "rgb": {
    "r": 27,
    "g": 66,
    "b": 99
  },
  "hsl": {
    "h": 207.5,
    "s": 57.143,
    "l": 24.706
  },
  "oklch": {
    "l": 0.36795,
    "c": 0.0721,
    "h": 246.9
  },
  "luminance": 0.0503
}

Semantic roles & 50–950 ramp

primary

#1B4263

secondary

#986941

accent

#8E47E0

background

#F6F7F8

surface

#EBEDF0

border

#C6C8CB

text

#05080C

muted

#7A7B7D

Preview Lab

Preview with #1B4263

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

Preview Lab → · Contrast checker → · Palette generator →