#183F71#183F71

#183F71 is a dark, moderate cyan. Relative luminance 0.049; OKLCH L 36.8% C 0.097 H 256.1°. Best body text is #FFFFFF at 10.56:1 contrast (WCAG AA passes).

Color values

HEX	#183F71
RGB	rgb(24, 63, 113)
HSL	hsl(214, 65%, 27%)
HSV	hsv(214, 79%, 44%)
CMYK	cmyk(78.8%, 44.2%, 0%, 55.7%)
CIE-LAB	lab(26.57, 5.53, -32.81)
CIE-LCH	lch(26.57, 33.27, 279.57°)
OKLab	oklab(36.84% -0.0233 -0.0938)
OKLCH	oklch(36.84% 0.097 256.1)
XYZ	xyz(5.1337, 4.9409, 16.3027)
Luminance	0.0494 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F71 #714A18

analogous

#186C71 #183F71 #1E1871

triadic

#183F71 #71183F #3F7118

tetradic

#183F71 #71186C #714A18 #18711E

square

#183F71 #71186C #714A18 #18711E

split-complementary

#183F71 #711E18 #6C7118

monochromatic

#050E19 #0D233F #183F71 #235BA3 #3078D3

Accessibility & contrast

On white

10.56

#183F71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#183F71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F71

10.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F71	#FFFFFF	#000000	##FFFFFF
##183F71	1.00	10.56	1.99	10.56
#FFFFFF	10.56	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#274373

Deuteranopia (green-blind)

#173B70

Tritanopia (blue-blind)

#004B52

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #183f71;
/* rgb */ color: rgb(24, 63, 113);
/* oklch */ color: oklch(36.8% 0.097 256.1);

Tailwind

colors: {
  custom: {
    50: '#63739a',
    500: '#183f71',
    950: '#000000',
  },
}

SCSS

$custom: #183f71;
$custom-light: #63739a;
$custom-dark: #000000;

JSON

{
  "hex": "#183f71",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 113
  },
  "hsl": {
    "h": 213.708,
    "s": 64.964,
    "l": 26.863
  },
  "oklch": {
    "l": 0.36837,
    "c": 0.09668,
    "h": 256.1
  },
  "luminance": 0.04941
}

Semantic roles & 50–950 ramp

primary

#183F71

secondary

#A6793E

accent

#9E40E8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #183F71

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

Preview Lab → · Contrast checker → · Palette generator →