#183A58#183A58

#183A58 is a dark, moderate cyan. Relative luminance 0.039; OKLCH L 33.9% C 0.066 H 247.8°. Best body text is #FFFFFF at 11.76:1 contrast (WCAG AA passes).

Color values

HEX	#183A58
RGB	rgb(24, 58, 88)
HSL	hsl(208, 57%, 22%)
HSV	hsv(208, 73%, 35%)
CMYK	cmyk(72.7%, 34.1%, 0%, 65.5%)
CIE-LAB	lab(23.42, -1.22, -21.65)
CIE-LCH	lch(23.42, 21.68, 266.78°)
OKLab	oklab(33.89% -0.025 -0.0612)
OKLCH	oklch(33.89% 0.066 247.8)
XYZ	xyz(3.6505, 3.9245, 9.7957)
Luminance	0.0393 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A58 #583618

analogous

#185856 #183A58 #181A58

triadic

#183A58 #58183A #3A5818

tetradic

#183A58 #561858 #583618 #1A5818

square

#183A58 #561858 #583618 #1A5818

split-complementary

#183A58 #58181A #585618

monochromatic

#071018 #0B1A28 #183A58 #255A88 #3279B8

Accessibility & contrast

On white

11.76

#183A58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#183A58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A58

11.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A58	#FFFFFF	#000000	##FFFFFF
##183A58	1.00	11.76	1.79	11.76
#FFFFFF	11.76	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D3B59

Deuteranopia (green-blind)

#243557

Tritanopia (blue-blind)

#004145

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #183a58;
/* rgb */ color: rgb(24, 58, 88);
/* oklch */ color: oklch(33.9% 0.066 247.8);

Tailwind

colors: {
  custom: {
    50: '#5d6f87',
    500: '#183a58',
    950: '#000000',
  },
}

SCSS

$custom: #183a58;
$custom-light: #5d6f87;
$custom-dark: #000000;

JSON

{
  "hex": "#183a58",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 88
  },
  "hsl": {
    "h": 208.125,
    "s": 57.143,
    "l": 21.961
  },
  "oklch": {
    "l": 0.33888,
    "c": 0.06616,
    "h": 247.8
  },
  "luminance": 0.03925
}

Semantic roles & 50–950 ramp

primary

#183A58

secondary

#8F633D

accent

#8F47E0

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#05070B

muted

#797A7C

Preview Lab

Preview with #183A58

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

Preview Lab → · Contrast checker → · Palette generator →