#183B54#183B54

#183B54 is a dark, muted cyan. Relative luminance 0.040; OKLCH L 33.9% C 0.060 H 242.5°. Best body text is #FFFFFF at 11.72:1 contrast (WCAG AA passes).

Color values

HEX	#183B54
RGB	rgb(24, 59, 84)
HSL	hsl(205, 56%, 21%)
HSV	hsv(205, 71%, 33%)
CMYK	cmyk(71.4%, 29.8%, 0%, 67.1%)
CIE-LAB	lab(23.54, -3.47, -18.82)
CIE-LCH	lch(23.54, 19.14, 259.56°)
OKLab	oklab(33.92% -0.0276 -0.053)
OKLCH	oklch(33.92% 0.06 242.5)
XYZ	xyz(3.5403, 3.9618, 8.9639)
Luminance	0.0396 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B54 #543118

analogous

#18544F #183B54 #181D54

triadic

#183B54 #54183B #3B5418

tetradic

#183B54 #4F1854 #543118 #1D5418

square

#183B54 #4F1854 #543118 #1D5418

split-complementary

#183B54 #54181D #544F18

monochromatic

#071118 #0A1A24 #183B54 #265C84 #337EB3

Accessibility & contrast

On white

11.72

#183B54 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#183B54 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B54

11.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B54	#FFFFFF	#000000	##FFFFFF
##183B54	1.00	11.72	1.79	11.72
#FFFFFF	11.72	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#303B55

Deuteranopia (green-blind)

#283554

Tritanopia (blue-blind)

#004144

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #183b54;
/* rgb */ color: rgb(24, 59, 84);
/* oklch */ color: oklch(33.9% 0.060 242.5);

Tailwind

colors: {
  custom: {
    50: '#5d7084',
    500: '#183b54',
    950: '#000000',
  },
}

SCSS

$custom: #183b54;
$custom-light: #5d7084;
$custom-dark: #000000;

JSON

{
  "hex": "#183b54",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 84
  },
  "hsl": {
    "h": 205,
    "s": 55.556,
    "l": 21.176
  },
  "oklch": {
    "l": 0.33915,
    "c": 0.0598,
    "h": 242.5
  },
  "luminance": 0.03962
}

Semantic roles & 50–950 ramp

primary

#183B54

secondary

#8B5D3D

accent

#8749DF

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04070B

muted

#797A7C

Preview Lab

Preview with #183B54

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

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