#183A4F#183A4F

#183A4F is a dark, muted cyan. Relative luminance 0.038; OKLCH L 33.4% C 0.054 H 238.5°. Best body text is #FFFFFF at 11.95:1 contrast (WCAG AA passes).

Color values

HEX	#183A4F
RGB	rgb(24, 58, 79)
HSL	hsl(203, 53%, 20%)
HSV	hsv(203, 70%, 31%)
CMYK	cmyk(69.6%, 26.6%, 0%, 69%)
CIE-LAB	lab(22.95, -4.75, -16.45)
CIE-LCH	lch(22.95, 17.12, 253.91°)
OKLab	oklab(33.36% -0.0283 -0.0462)
OKLCH	oklch(33.36% 0.054 238.5)
XYZ	xyz(3.3005, 3.7845, 7.9522)
Luminance	0.0379 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A4F #4F2D18

analogous

#184F48 #183A4F #181E4F

triadic

#183A4F #4F183A #3A4F18

tetradic

#183A4F #48184F #4F2D18 #1E4F18

square

#183A4F #48184F #4F2D18 #1E4F18

split-complementary

#183A4F #4F181E #4F4818

monochromatic

#071117 #0A1820 #183A4F #265C7E #357FAD

Accessibility & contrast

On white

11.95

#183A4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#183A4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A4F

11.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A4F	#FFFFFF	#000000	##FFFFFF
##183A4F	1.00	11.95	1.76	11.95
#FFFFFF	11.95	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#303A50

Deuteranopia (green-blind)

#29344F

Tritanopia (blue-blind)

#003F41

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #183a4f;
/* rgb */ color: rgb(24, 58, 79);
/* oklch */ color: oklch(33.4% 0.054 238.5);

Tailwind

colors: {
  custom: {
    50: '#5c7080',
    500: '#183a4f',
    950: '#000000',
  },
}

SCSS

$custom: #183a4f;
$custom-light: #5c7080;
$custom-dark: #000000;

JSON

{
  "hex": "#183a4f",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 79
  },
  "hsl": {
    "h": 202.909,
    "s": 53.398,
    "l": 20.196
  },
  "oklch": {
    "l": 0.33357,
    "c": 0.05419,
    "h": 238.5
  },
  "luminance": 0.03785
}

Semantic roles & 50–950 ramp

primary

#183A4F

secondary

#86593D

accent

#834BDD

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04070A

muted

#797A7C

Preview Lab

Preview with #183A4F

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

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