#183E6D#183E6D

#183E6D is a dark, moderate cyan. Relative luminance 0.047; OKLCH L 36.3% C 0.092 H 255.4°. Best body text is #FFFFFF at 10.78:1 contrast (WCAG AA passes).

Color values

HEX	#183E6D
RGB	rgb(24, 62, 109)
HSL	hsl(213, 64%, 26%)
HSV	hsv(213, 78%, 43%)
CMYK	cmyk(78%, 43.1%, 0%, 57.3%)
CIE-LAB	lab(25.99, 4.57, -31.18)
CIE-LCH	lch(25.99, 31.52, 278.35°)
OKLab	oklab(36.31% -0.0233 -0.0891)
OKLCH	oklch(36.31% 0.092 255.4)
XYZ	xyz(4.8586, 4.7430, 15.1245)
Luminance	0.0474 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E6D #6D4718

analogous

#18686D #183E6D #1C186D

triadic

#183E6D #6D183E #3E6D18

tetradic

#183E6D #6D1868 #6D4718 #186D1C

square

#183E6D #6D1868 #6D4718 #186D1C

split-complementary

#183E6D #6D1C18 #686D18

monochromatic

#060E19 #0D213B #183E6D #235B9F #2E77D1

Accessibility & contrast

On white

10.78

#183E6D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#183E6D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E6D

10.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E6D	#FFFFFF	#000000	##FFFFFF
##183E6D	1.00	10.78	1.95	10.78
#FFFFFF	10.78	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#28426F

Deuteranopia (green-blind)

#193A6C

Tritanopia (blue-blind)

#004950

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183e6d;
/* rgb */ color: rgb(24, 62, 109);
/* oklch */ color: oklch(36.3% 0.092 255.4);

Tailwind

colors: {
  custom: {
    50: '#627297',
    500: '#183e6d',
    950: '#000000',
  },
}

SCSS

$custom: #183e6d;
$custom-light: #627297;
$custom-dark: #000000;

JSON

{
  "hex": "#183e6d",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 109
  },
  "hsl": {
    "h": 213.176,
    "s": 63.91,
    "l": 26.078
  },
  "oklch": {
    "l": 0.36306,
    "c": 0.09206,
    "h": 255.4
  },
  "luminance": 0.04744
}

Semantic roles & 50–950 ramp

primary

#183E6D

secondary

#A3763E

accent

#9D41E7

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080D

muted

#7A7B7E

Preview Lab

Preview with #183E6D

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

Preview Lab → · Contrast checker → · Palette generator →