#183E54#183E54

#183E54 is a dark, muted cyan. Relative luminance 0.043; OKLCH L 34.7% C 0.058 H 237.1°. Best body text is #FFFFFF at 11.31:1 contrast (WCAG AA passes).

Color values

HEX	#183E54
RGB	rgb(24, 62, 84)
HSL	hsl(202, 56%, 21%)
HSV	hsv(202, 71%, 33%)
CMYK	cmyk(71.4%, 26.2%, 0%, 67.1%)
CIE-LAB	lab(24.57, -5.45, -17.22)
CIE-LCH	lch(24.57, 18.06, 252.45°)
OKLab	oklab(34.73% -0.0313 -0.0484)
OKLCH	oklch(34.73% 0.058 237.1)
XYZ	xyz(3.6989, 4.2791, 9.0168)
Luminance	0.0428 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E54 #542E18

analogous

#18544C #183E54 #182054

triadic

#183E54 #54183E #3E5418

tetradic

#183E54 #4C1854 #542E18 #205418

square

#183E54 #4C1854 #542E18 #205418

split-complementary

#183E54 #541820 #544C18

monochromatic

#071218 #0A1B24 #183E54 #266184 #3384B3

Accessibility & contrast

On white

11.31

#183E54 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#183E54 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E54

11.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E54	#FFFFFF	#000000	##FFFFFF
##183E54	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)

#343E55

Deuteranopia (green-blind)

#2B3854

Tritanopia (blue-blind)

#004445

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183e54;
/* rgb */ color: rgb(24, 62, 84);
/* oklch */ color: oklch(34.7% 0.058 237.1);

Tailwind

colors: {
  custom: {
    50: '#5d7384',
    500: '#183e54',
    950: '#000000',
  },
}

SCSS

$custom: #183e54;
$custom-light: #5d7384;
$custom-dark: #000000;

JSON

{
  "hex": "#183e54",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 84
  },
  "hsl": {
    "h": 202,
    "s": 55.556,
    "l": 21.176
  },
  "oklch": {
    "l": 0.34731,
    "c": 0.05759,
    "h": 237.1
  },
  "luminance": 0.0428
}

Semantic roles & 50–950 ramp

primary

#183E54

secondary

#8B5A3D

accent

#8049DF

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04080B

muted

#797B7C

Preview Lab

Preview with #183E54

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

Preview Lab → · Contrast checker → · Palette generator →