#183F4C#183F4C

#183F4C is a dark, muted cyan. Relative luminance 0.043; OKLCH L 34.6% C 0.049 H 222.9°. Best body text is #FFFFFF at 11.33:1 contrast (WCAG AA passes).

Color values

HEX	#183F4C
RGB	rgb(24, 63, 76)
HSL	hsl(195, 52%, 20%)
HSV	hsv(195, 68%, 30%)
CMYK	cmyk(68.4%, 17.1%, 0%, 70.2%)
CIE-LAB	lab(24.55, -9.09, -12.00)
CIE-LCH	lch(24.55, 15.05, 232.85°)
OKLab	oklab(34.59% -0.0359 -0.0334)
OKLCH	oklch(34.59% 0.049 222.9)
XYZ	xyz(3.4582, 4.2707, 7.4781)
Luminance	0.0427 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F4C #4C2518

analogous

#184C3F #183F4C #18254C

triadic

#183F4C #4C183F #3F4C18

tetradic

#183F4C #3F184C #4C2518 #254C18

square

#183F4C #3F184C #4C2518 #254C18

split-complementary

#183F4C #4C1825 #4C3F18

monochromatic

#071317 #09181D #183F4C #27667B #358CA9

Accessibility & contrast

On white

11.33

#183F4C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#183F4C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F4C

11.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F4C	#FFFFFF	#000000	##FFFFFF
##183F4C	1.00	11.33	1.85	11.33
#FFFFFF	11.33	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#383D4D

Deuteranopia (green-blind)

#30384C

Tritanopia (blue-blind)

#004343

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183f4c;
/* rgb */ color: rgb(24, 63, 76);
/* oklch */ color: oklch(34.6% 0.049 222.9);

Tailwind

colors: {
  custom: {
    50: '#5b747e',
    500: '#183f4c',
    950: '#000000',
  },
}

SCSS

$custom: #183f4c;
$custom-light: #5b747e;
$custom-dark: #000000;

JSON

{
  "hex": "#183f4c",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 76
  },
  "hsl": {
    "h": 195,
    "s": 52,
    "l": 19.608
  },
  "oklch": {
    "l": 0.34586,
    "c": 0.04905,
    "h": 222.9
  },
  "luminance": 0.04271
}

Semantic roles & 50–950 ramp

primary

#183F4C

secondary

#834E3D

accent

#704CDB

background

#F5F7F7

surface

#E9EDEE

border

#C5C8C9

text

#040809

muted

#797B7B

Preview Lab

Preview with #183F4C

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

Preview Lab → · Contrast checker → · Palette generator →