#183C4F#183C4F

#183C4F is a dark, muted cyan. Relative luminance 0.040; OKLCH L 33.9% C 0.053 H 234.4°. Best body text is #FFFFFF at 11.68:1 contrast (WCAG AA passes).

Color values

HEX	#183C4F
RGB	rgb(24, 60, 79)
HSL	hsl(201, 53%, 20%)
HSV	hsv(201, 70%, 31%)
CMYK	cmyk(69.6%, 24.1%, 0%, 69%)
CIE-LAB	lab(23.64, -6.06, -15.38)
CIE-LCH	lch(23.64, 16.53, 248.50°)
OKLab	oklab(33.91% -0.0308 -0.0431)
OKLCH	oklch(33.91% 0.053 234.4)
XYZ	xyz(3.4033, 3.9901, 7.9864)
Luminance	0.0399 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C4F #4F2B18

analogous

#184F46 #183C4F #18214F

triadic

#183C4F #4F183C #3C4F18

tetradic

#183C4F #46184F #4F2B18 #214F18

square

#183C4F #46184F #4F2B18 #214F18

split-complementary

#183C4F #4F1821 #4F4618

monochromatic

#071217 #0A1820 #183C4F #26607E #3583AD

Accessibility & contrast

On white

11.68

#183C4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#183C4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C4F

11.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C4F	#FFFFFF	#000000	##FFFFFF
##183C4F	1.00	11.68	1.80	11.68
#FFFFFF	11.68	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#333B50

Deuteranopia (green-blind)

#2B364F

Tritanopia (blue-blind)

#004142

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #183c4f;
/* rgb */ color: rgb(24, 60, 79);
/* oklch */ color: oklch(33.9% 0.053 234.4);

Tailwind

colors: {
  custom: {
    50: '#5c7180',
    500: '#183c4f',
    950: '#000000',
  },
}

SCSS

$custom: #183c4f;
$custom-light: #5c7180;
$custom-dark: #000000;

JSON

{
  "hex": "#183c4f",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 79
  },
  "hsl": {
    "h": 200.727,
    "s": 53.398,
    "l": 20.196
  },
  "oklch": {
    "l": 0.33907,
    "c": 0.05298,
    "h": 234.4
  },
  "luminance": 0.0399
}

Semantic roles & 50–950 ramp

primary

#183C4F

secondary

#86563D

accent

#7D4BDD

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04070A

muted

#797A7C

Preview Lab

Preview with #183C4F

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

Preview Lab → · Contrast checker → · Palette generator →