#183A4A#183A4A

#183A4A is a dark, muted cyan. Relative luminance 0.037; OKLCH L 33.1% C 0.048 H 231.1°. Best body text is #FFFFFF at 12.05:1 contrast (WCAG AA passes).

Color values

HEX	#183A4A
RGB	rgb(24, 58, 74)
HSL	hsl(199, 51%, 19%)
HSV	hsv(199, 68%, 29%)
CMYK	cmyk(67.6%, 21.6%, 0%, 71%)
CIE-LAB	lab(22.70, -6.64, -13.50)
CIE-LCH	lch(22.70, 15.05, 243.81°)
OKLab	oklab(33.09% -0.0304 -0.0377)
OKLCH	oklch(33.09% 0.048 231.1)
XYZ	xyz(3.1253, 3.7144, 7.0295)
Luminance	0.0372 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A4A #4A2818

analogous

#184A41 #183A4A #18214A

triadic

#183A4A #4A183A #3A4A18

tetradic

#183A4A #41184A #4A2818 #214A18

square

#183A4A #41184A #4A2818 #214A18

split-complementary

#183A4A #4A1821 #4A4118

monochromatic

#071217 #09161C #183A4A #275E78 #3682A6

Accessibility & contrast

On white

12.05

#183A4A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#183A4A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A4A

12.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A4A	#FFFFFF	#000000	##FFFFFF
##183A4A	1.00	12.05	1.74	12.05
#FFFFFF	12.05	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#32394B

Deuteranopia (green-blind)

#2B344A

Tritanopia (blue-blind)

#003E3F

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #183a4a;
/* rgb */ color: rgb(24, 58, 74);
/* oklch */ color: oklch(33.1% 0.048 231.1);

Tailwind

colors: {
  custom: {
    50: '#5b707c',
    500: '#183a4a',
    950: '#000000',
  },
}

SCSS

$custom: #183a4a;
$custom-light: #5b707c;
$custom-dark: #000000;

JSON

{
  "hex": "#183a4a",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 74
  },
  "hsl": {
    "h": 199.2,
    "s": 51.02,
    "l": 19.216
  },
  "oklch": {
    "l": 0.33085,
    "c": 0.04845,
    "h": 231.1
  },
  "luminance": 0.03715
}

Semantic roles & 50–950 ramp

primary

#183A4A

secondary

#81533D

accent

#7A4DDA

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#040709

muted

#797A7B

Preview Lab

Preview with #183A4A

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

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