#183F54#183F54

#183F54 is a dark, muted cyan. Relative luminance 0.044; OKLCH L 35.0% C 0.057 H 235.3°. Best body text is #FFFFFF at 11.18:1 contrast (WCAG AA passes).

Color values

HEX	#183F54
RGB	rgb(24, 63, 84)
HSL	hsl(201, 56%, 21%)
HSV	hsv(201, 71%, 33%)
CMYK	cmyk(71.4%, 25%, 0%, 67.1%)
CIE-LAB	lab(24.92, -6.10, -16.69)
CIE-LCH	lch(24.92, 17.77, 249.93°)
OKLab	oklab(35% -0.0325 -0.0468)
OKLCH	oklch(35% 0.057 235.3)
XYZ	xyz(3.7538, 4.3889, 9.0351)
Luminance	0.0439 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F54 #542D18

analogous

#18544B #183F54 #182154

triadic

#183F54 #54183F #3F5418

tetradic

#183F54 #4B1854 #542D18 #215418

square

#183F54 #4B1854 #542D18 #215418

split-complementary

#183F54 #541821 #544B18

monochromatic

#071218 #0A1B24 #183F54 #266384 #3386B3

Accessibility & contrast

On white

11.18

#183F54 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#183F54 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F54

11.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F54	#FFFFFF	#000000	##FFFFFF
##183F54	1.00	11.18	1.88	11.18
#FFFFFF	11.18	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#353E55

Deuteranopia (green-blind)

#2D3854

Tritanopia (blue-blind)

#004446

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #183f54;
/* rgb */ color: rgb(24, 63, 84);
/* oklch */ color: oklch(35.0% 0.057 235.3);

Tailwind

colors: {
  custom: {
    50: '#5d7484',
    500: '#183f54',
    950: '#000000',
  },
}

SCSS

$custom: #183f54;
$custom-light: #5d7484;
$custom-dark: #000000;

JSON

{
  "hex": "#183f54",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 84
  },
  "hsl": {
    "h": 201,
    "s": 55.556,
    "l": 21.176
  },
  "oklch": {
    "l": 0.35004,
    "c": 0.05699,
    "h": 235.3
  },
  "luminance": 0.04389
}

Semantic roles & 50–950 ramp

primary

#183F54

secondary

#8B583D

accent

#7D49DF

background

#F5F7F8

surface

#E9EDEF

border

#C5C8CA

text

#04080A

muted

#797B7C

Preview Lab

Preview with #183F54

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

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