#183F4D#183F4D

#183F4D is a dark, muted cyan. Relative luminance 0.043; OKLCH L 34.6% C 0.050 H 224.7°. Best body text is #FFFFFF at 11.31:1 contrast (WCAG AA passes).

Color values

HEX	#183F4D
RGB	rgb(24, 63, 77)
HSL	hsl(196, 52%, 20%)
HSV	hsv(196, 69%, 30%)
CMYK	cmyk(68.8%, 18.2%, 0%, 69.8%)
CIE-LAB	lab(24.59, -8.72, -12.59)
CIE-LCH	lch(24.59, 15.32, 235.28°)
OKLab	oklab(34.64% -0.0355 -0.0351)
OKLCH	oklch(34.64% 0.05 224.7)
XYZ	xyz(3.4932, 4.2847, 7.6627)
Luminance	0.0428 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F4D #4D2618

analogous

#184D41 #183F4D #18254D

triadic

#183F4D #4D183F #3F4D18

tetradic

#183F4D #41184D #4D2618 #254D18

square

#183F4D #41184D #4D2618 #254D18

split-complementary

#183F4D #4D1825 #4D4118

monochromatic

#071317 #09191E #183F4D #27657C #358BAA

Accessibility & contrast

On white

11.31

#183F4D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#183F4D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F4D

11.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F4D	#FFFFFF	#000000	##FFFFFF
##183F4D	1.00	11.31	1.86	11.31
#FFFFFF	11.31	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#373E4E

Deuteranopia (green-blind)

#30384D

Tritanopia (blue-blind)

#004343

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183f4d;
/* rgb */ color: rgb(24, 63, 77);
/* oklch */ color: oklch(34.6% 0.050 224.7);

Tailwind

colors: {
  custom: {
    50: '#5c747e',
    500: '#183f4d',
    950: '#000000',
  },
}

SCSS

$custom: #183f4d;
$custom-light: #5c747e;
$custom-dark: #000000;

JSON

{
  "hex": "#183f4d",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 77
  },
  "hsl": {
    "h": 195.849,
    "s": 52.475,
    "l": 19.804
  },
  "oklch": {
    "l": 0.34636,
    "c": 0.04989,
    "h": 224.7
  },
  "luminance": 0.04285
}

Semantic roles & 50–950 ramp

primary

#183F4D

secondary

#84503D

accent

#724CDC

background

#F5F7F7

surface

#E9EDEE

border

#C5C8C9

text

#04080A

muted

#797B7C

Preview Lab

Preview with #183F4D

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

Preview Lab → · Contrast checker → · Palette generator →