#183F61#183F61

#183F61 is a dark, moderate cyan. Relative luminance 0.046; OKLCH L 35.8% C 0.074 H 247.9°. Best body text is #FFFFFF at 10.92:1 contrast (WCAG AA passes).

Color values

HEX	#183F61
RGB	rgb(24, 63, 97)
HSL	hsl(208, 60%, 24%)
HSV	hsv(208, 75%, 38%)
CMYK	cmyk(75.3%, 35.1%, 0%, 62%)
CIE-LAB	lab(25.60, -0.99, -24.09)
CIE-LCH	lch(25.60, 24.11, 267.64°)
OKLab	oklab(35.77% -0.0277 -0.0683)
OKLCH	oklch(35.77% 0.074 247.9)
XYZ	xyz(4.3110, 4.6118, 11.9699)
Luminance	0.0461 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F61 #613A18

analogous

#18615E #183F61 #181A61

triadic

#183F61 #61183F #3F6118

tetradic

#183F61 #5E1861 #613A18 #1A6118

square

#183F61 #5E1861 #613A18 #1A6118

split-complementary

#183F61 #61181A #615E18

monochromatic

#061019 #0C1F30 #183F61 #245F92 #307FC3

Accessibility & contrast

On white

10.92

#183F61 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#183F61 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F61

10.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F61	#FFFFFF	#000000	##FFFFFF
##183F61	1.00	10.92	1.92	10.92
#FFFFFF	10.92	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#304062

Deuteranopia (green-blind)

#253A60

Tritanopia (blue-blind)

#00474B

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #183f61;
/* rgb */ color: rgb(24, 63, 97);
/* oklch */ color: oklch(35.8% 0.074 247.9);

Tailwind

colors: {
  custom: {
    50: '#5f738e',
    500: '#183f61',
    950: '#000000',
  },
}

SCSS

$custom: #183f61;
$custom-light: #5f738e;
$custom-dark: #000000;

JSON

{
  "hex": "#183f61",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 97
  },
  "hsl": {
    "h": 207.945,
    "s": 60.331,
    "l": 23.725
  },
  "oklch": {
    "l": 0.35767,
    "c": 0.0737,
    "h": 247.9
  },
  "luminance": 0.04612
}

Semantic roles & 50–950 ramp

primary

#183F61

secondary

#97673D

accent

#8E44E3

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05080C

muted

#797B7D

Preview Lab

Preview with #183F61

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

Preview Lab → · Contrast checker → · Palette generator →