#183A56#183A56

#183A56 is a dark, moderate cyan. Relative luminance 0.039; OKLCH L 33.8% C 0.063 H 246.1°. Best body text is #FFFFFF at 11.81:1 contrast (WCAG AA passes).

Color values

HEX	#183A56
RGB	rgb(24, 58, 86)
HSL	hsl(207, 56%, 22%)
HSV	hsv(207, 72%, 34%)
CMYK	cmyk(72.1%, 32.6%, 0%, 66.3%)
CIE-LAB	lab(23.31, -2.01, -20.51)
CIE-LCH	lch(23.31, 20.61, 264.40°)
OKLab	oklab(33.77% -0.0257 -0.0579)
OKLCH	oklch(33.77% 0.063 246.1)
XYZ	xyz(3.5688, 3.8918, 9.3654)
Luminance	0.0389 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A56 #563418

analogous

#185653 #183A56 #181B56

triadic

#183A56 #56183A #3A5618

tetradic

#183A56 #531856 #563418 #1B5618

square

#183A56 #531856 #563418 #1B5618

split-complementary

#183A56 #56181B #565318

monochromatic

#071018 #0B1A26 #183A56 #255A86 #337BB6

Accessibility & contrast

On white

11.81

#183A56 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#183A56 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A56

11.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A56	#FFFFFF	#000000	##FFFFFF
##183A56	1.00	11.81	1.78	11.81
#FFFFFF	11.81	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E3B57

Deuteranopia (green-blind)

#253555

Tritanopia (blue-blind)

#004144

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #183a56;
/* rgb */ color: rgb(24, 58, 86);
/* oklch */ color: oklch(33.8% 0.063 246.1);

Tailwind

colors: {
  custom: {
    50: '#5d6f85',
    500: '#183a56',
    950: '#000000',
  },
}

SCSS

$custom: #183a56;
$custom-light: #5d6f85;
$custom-dark: #000000;

JSON

{
  "hex": "#183a56",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 86
  },
  "hsl": {
    "h": 207.097,
    "s": 56.364,
    "l": 21.569
  },
  "oklch": {
    "l": 0.33765,
    "c": 0.06337,
    "h": 246.1
  },
  "luminance": 0.03892
}

Semantic roles & 50–950 ramp

primary

#183A56

secondary

#8D613D

accent

#8D48E0

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#05070B

muted

#797A7C

Preview Lab

Preview with #183A56

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

Preview Lab → · Contrast checker → · Palette generator →