#183F6A#183F6A

#183F6A is a dark, moderate cyan. Relative luminance 0.048; OKLCH L 36.4% C 0.086 H 253.2°. Best body text is #FFFFFF at 10.73:1 contrast (WCAG AA passes).

Color values

HEX	#183F6A
RGB	rgb(24, 63, 106)
HSL	hsl(211, 63%, 25%)
HSV	hsv(211, 77%, 42%)
CMYK	cmyk(77.4%, 40.6%, 0%, 58.4%)
CIE-LAB	lab(26.13, 2.65, -29.05)
CIE-LCH	lch(26.13, 29.17, 275.22°)
OKLab	oklab(36.35% -0.025 -0.0828)
OKLCH	oklch(36.35% 0.087 253.2)
XYZ	xyz(4.7547, 4.7893, 14.3067)
Luminance	0.0479 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F6A #6A4318

analogous

#18686A #183F6A #1A186A

triadic

#183F6A #6A183F #3F6A18

tetradic

#183F6A #6A1868 #6A4318 #186A1A

square

#183F6A #6A1868 #6A4318 #186A1A

split-complementary

#183F6A #6A1A18 #686A18

monochromatic

#060F19 #0D2138 #183F6A #235D9C #2F7ACE

Accessibility & contrast

On white

10.73

#183F6A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#183F6A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F6A

10.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F6A	#FFFFFF	#000000	##FFFFFF
##183F6A	1.00	10.73	1.96	10.73
#FFFFFF	10.73	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B426C

Deuteranopia (green-blind)

#1E3A69

Tritanopia (blue-blind)

#00494F

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183f6a;
/* rgb */ color: rgb(24, 63, 106);
/* oklch */ color: oklch(36.4% 0.086 253.2);

Tailwind

colors: {
  custom: {
    50: '#617395',
    500: '#183f6a',
    950: '#000000',
  },
}

SCSS

$custom: #183f6a;
$custom-light: #617395;
$custom-dark: #000000;

JSON

{
  "hex": "#183f6a",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 106
  },
  "hsl": {
    "h": 211.463,
    "s": 63.077,
    "l": 25.49
  },
  "oklch": {
    "l": 0.36352,
    "c": 0.0865,
    "h": 253.2
  },
  "luminance": 0.0479
}

Semantic roles & 50–950 ramp

primary

#183F6A

secondary

#A0713E

accent

#9842E6

background

#F6F6F9

surface

#EBECF1

border

#C6C7CB

text

#06080D

muted

#7A7B7E

Preview Lab

Preview with #183F6A

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

Preview Lab → · Contrast checker → · Palette generator →