#183B4E#183B4E

#183B4E is a dark, muted cyan. Relative luminance 0.039; OKLCH L 33.6% C 0.052 H 235.1°. Best body text is #FFFFFF at 11.83:1 contrast (WCAG AA passes).

Color values

HEX	#183B4E
RGB	rgb(24, 59, 78)
HSL	hsl(201, 53%, 20%)
HSV	hsv(201, 69%, 31%)
CMYK	cmyk(69.2%, 24.4%, 0%, 69.4%)
CIE-LAB	lab(23.24, -5.78, -15.33)
CIE-LCH	lch(23.24, 16.38, 249.33°)
OKLab	oklab(33.58% -0.03 -0.0429)
OKLCH	oklch(33.58% 0.052 235.1)
XYZ	xyz(3.3153, 3.8718, 7.7789)
Luminance	0.0387 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B4E #4E2B18

analogous

#184E46 #183B4E #18204E

triadic

#183B4E #4E183B #3B4E18

tetradic

#183B4E #46184E #4E2B18 #204E18

square

#183B4E #46184E #4E2B18 #204E18

split-complementary

#183B4E #4E1820 #4E4618

monochromatic

#071217 #0A181F #183B4E #265E7D #3582AC

Accessibility & contrast

On white

11.83

#183B4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#183B4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B4E

11.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B4E	#FFFFFF	#000000	##FFFFFF
##183B4E	1.00	11.83	1.77	11.83
#FFFFFF	11.83	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#323A4F

Deuteranopia (green-blind)

#2A354E

Tritanopia (blue-blind)

#004041

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #183b4e;
/* rgb */ color: rgb(24, 59, 78);
/* oklch */ color: oklch(33.6% 0.052 235.1);

Tailwind

colors: {
  custom: {
    50: '#5b707f',
    500: '#183b4e',
    950: '#000000',
  },
}

SCSS

$custom: #183b4e;
$custom-light: #5b707f;
$custom-dark: #000000;

JSON

{
  "hex": "#183b4e",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 78
  },
  "hsl": {
    "h": 201.111,
    "s": 52.941,
    "l": 20
  },
  "oklch": {
    "l": 0.33577,
    "c": 0.05238,
    "h": 235.1
  },
  "luminance": 0.03872
}

Semantic roles & 50–950 ramp

primary

#183B4E

secondary

#85563D

accent

#7E4BDC

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04070A

muted

#797A7C

Preview Lab

Preview with #183B4E

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

Preview Lab → · Contrast checker → · Palette generator →