#183E4C#183E4C

#183E4C is a dark, muted cyan. Relative luminance 0.042; OKLCH L 34.3% C 0.049 H 225.2°. Best body text is #FFFFFF at 11.46:1 contrast (WCAG AA passes).

Color values

HEX	#183E4C
RGB	rgb(24, 62, 76)
HSL	hsl(196, 52%, 20%)
HSV	hsv(196, 68%, 30%)
CMYK	cmyk(68.4%, 18.4%, 0%, 70.2%)
CIE-LAB	lab(24.20, -8.46, -12.53)
CIE-LCH	lch(24.20, 15.12, 235.98°)
OKLab	oklab(34.31% -0.0346 -0.0349)
OKLCH	oklch(34.31% 0.049 225.2)
XYZ	xyz(3.4033, 4.1609, 7.4599)
Luminance	0.0416 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E4C #4C2618

analogous

#184C40 #183E4C #18244C

triadic

#183E4C #4C183E #3E4C18

tetradic

#183E4C #40184C #4C2618 #244C18

square

#183E4C #40184C #4C2618 #244C18

split-complementary

#183E4C #4C1824 #4C4018

monochromatic

#071317 #09181D #183E4C #27647B #358AA9

Accessibility & contrast

On white

11.46

#183E4C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#183E4C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E4C

11.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E4C	#FFFFFF	#000000	##FFFFFF
##183E4C	1.00	11.46	1.83	11.46
#FFFFFF	11.46	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#363D4D

Deuteranopia (green-blind)

#2F374C

Tritanopia (blue-blind)

#004243

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183e4c;
/* rgb */ color: rgb(24, 62, 76);
/* oklch */ color: oklch(34.3% 0.049 225.2);

Tailwind

colors: {
  custom: {
    50: '#5b737e',
    500: '#183e4c',
    950: '#000000',
  },
}

SCSS

$custom: #183e4c;
$custom-light: #5b737e;
$custom-dark: #000000;

JSON

{
  "hex": "#183e4c",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 76
  },
  "hsl": {
    "h": 196.154,
    "s": 52,
    "l": 19.608
  },
  "oklch": {
    "l": 0.34306,
    "c": 0.0492,
    "h": 225.2
  },
  "luminance": 0.04161
}

Semantic roles & 50–950 ramp

primary

#183E4C

secondary

#83503D

accent

#734CDB

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#040809

muted

#797B7B

Preview Lab

Preview with #183E4C

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

Preview Lab → · Contrast checker → · Palette generator →