#183C59#183C59

#183C59 is a dark, moderate cyan. Relative luminance 0.041; OKLCH L 34.5% C 0.066 H 245.7°. Best body text is #FFFFFF at 11.48:1 contrast (WCAG AA passes).

Color values

HEX	#183C59
RGB	rgb(24, 60, 89)
HSL	hsl(207, 58%, 22%)
HSV	hsv(207, 73%, 35%)
CMYK	cmyk(73%, 32.6%, 0%, 65.1%)
CIE-LAB	lab(24.15, -2.17, -21.16)
CIE-LCH	lch(24.15, 21.27, 264.14°)
OKLab	oklab(34.48% -0.027 -0.0598)
OKLCH	oklch(34.48% 0.066 245.7)
XYZ	xyz(3.7950, 4.1468, 10.0497)
Luminance	0.0415 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C59 #593518

analogous

#185956 #183C59 #181C59

triadic

#183C59 #59183C #3C5918

tetradic

#183C59 #561859 #593518 #1C5918

square

#183C59 #561859 #593518 #1C5918

split-complementary

#183C59 #59181C #595618

monochromatic

#061018 #0B1C29 #183C59 #255C89 #327DB9

Accessibility & contrast

On white

11.48

#183C59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#183C59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C59

11.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C59	#FFFFFF	#000000	##FFFFFF
##183C59	1.00	11.48	1.83	11.48
#FFFFFF	11.48	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F3D5A

Deuteranopia (green-blind)

#263758

Tritanopia (blue-blind)

#004346

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183c59;
/* rgb */ color: rgb(24, 60, 89);
/* oklch */ color: oklch(34.5% 0.066 245.7);

Tailwind

colors: {
  custom: {
    50: '#5e7188',
    500: '#183c59',
    950: '#000000',
  },
}

SCSS

$custom: #183c59;
$custom-light: #5e7188;
$custom-dark: #000000;

JSON

{
  "hex": "#183c59",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 89
  },
  "hsl": {
    "h": 206.769,
    "s": 57.522,
    "l": 22.157
  },
  "oklch": {
    "l": 0.34481,
    "c": 0.06561,
    "h": 245.7
  },
  "luminance": 0.04147
}

Semantic roles & 50–950 ramp

primary

#183C59

secondary

#90623D

accent

#8C47E1

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#05070B

muted

#797A7C

Preview Lab

Preview with #183C59

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

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