#183B4C#183B4C

#183B4C is a dark, muted cyan. Relative luminance 0.038; OKLCH L 33.5% C 0.050 H 232.1°. Best body text is #FFFFFF at 11.87:1 contrast (WCAG AA passes).

Color values

HEX	#183B4C
RGB	rgb(24, 59, 76)
HSL	hsl(200, 52%, 20%)
HSV	hsv(200, 68%, 30%)
CMYK	cmyk(68.4%, 22.4%, 0%, 70.2%)
CIE-LAB	lab(23.15, -6.54, -14.15)
CIE-LCH	lch(23.15, 15.59, 245.19°)
OKLab	oklab(33.47% -0.0308 -0.0396)
OKLCH	oklch(33.47% 0.05 232.1)
XYZ	xyz(3.2447, 3.8436, 7.4070)
Luminance	0.0384 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B4C #4C2918

analogous

#184C43 #183B4C #18214C

triadic

#183B4C #4C183B #3B4C18

tetradic

#183B4C #43184C #4C2918 #214C18

square

#183B4C #43184C #4C2918 #214C18

split-complementary

#183B4C #4C1821 #4C4318

monochromatic

#071217 #09171D #183B4C #275F7B #3583A9

Accessibility & contrast

On white

11.87

#183B4C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#183B4C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B4C

11.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B4C	#FFFFFF	#000000	##FFFFFF
##183B4C	1.00	11.87	1.77	11.87
#FFFFFF	11.87	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#333A4D

Deuteranopia (green-blind)

#2B354C

Tritanopia (blue-blind)

#004041

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #183b4c;
/* rgb */ color: rgb(24, 59, 76);
/* oklch */ color: oklch(33.5% 0.050 232.1);

Tailwind

colors: {
  custom: {
    50: '#5b707e',
    500: '#183b4c',
    950: '#000000',
  },
}

SCSS

$custom: #183b4c;
$custom-light: #5b707e;
$custom-dark: #000000;

JSON

{
  "hex": "#183b4c",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 76
  },
  "hsl": {
    "h": 199.615,
    "s": 52,
    "l": 19.608
  },
  "oklch": {
    "l": 0.33469,
    "c": 0.05015,
    "h": 232.1
  },
  "luminance": 0.03844
}

Semantic roles & 50–950 ramp

primary

#183B4C

secondary

#83543D

accent

#7B4CDB

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#040709

muted

#797A7B

Preview Lab

Preview with #183B4C

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

Preview Lab → · Contrast checker → · Palette generator →