#183D6A#183D6A

#183D6A is a dark, moderate cyan. Relative luminance 0.046; OKLCH L 35.8% C 0.089 H 255.0°. Best body text is #FFFFFF at 10.97:1 contrast (WCAG AA passes).

Color values

HEX	#183D6A
RGB	rgb(24, 61, 106)
HSL	hsl(213, 63%, 25%)
HSV	hsv(213, 77%, 42%)
CMYK	cmyk(77.4%, 42.5%, 0%, 58.4%)
CIE-LAB	lab(25.48, 4.03, -30.08)
CIE-LCH	lch(25.48, 30.35, 277.63°)
OKLab	oklab(35.85% -0.023 -0.0858)
OKLCH	oklch(35.85% 0.089 255)
XYZ	xyz(4.6460, 4.5718, 14.2705)
Luminance	0.0457 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D6A #6A4518

analogous

#18666A #183D6A #1C186A

triadic

#183D6A #6A183D #3D6A18

tetradic

#183D6A #6A1866 #6A4518 #186A1C

square

#183D6A #6A1866 #6A4518 #186A1C

split-complementary

#183D6A #6A1C18 #666A18

monochromatic

#060E19 #0D2038 #183D6A #235A9C #2F76CE

Accessibility & contrast

On white

10.97

#183D6A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#183D6A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D6A

10.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D6A	#FFFFFF	#000000	##FFFFFF
##183D6A	1.00	10.97	1.91	10.97
#FFFFFF	10.97	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	10.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#28406C

Deuteranopia (green-blind)

#1B3969

Tritanopia (blue-blind)

#00484E

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #183d6a;
/* rgb */ color: rgb(24, 61, 106);
/* oklch */ color: oklch(35.8% 0.089 255.0);

Tailwind

colors: {
  custom: {
    50: '#617295',
    500: '#183d6a',
    950: '#000000',
  },
}

SCSS

$custom: #183d6a;
$custom-light: #617295;
$custom-dark: #000000;

JSON

{
  "hex": "#183d6a",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 106
  },
  "hsl": {
    "h": 212.927,
    "s": 63.077,
    "l": 25.49
  },
  "oklch": {
    "l": 0.35847,
    "c": 0.08887,
    "h": 255
  },
  "luminance": 0.04572
}

Semantic roles & 50–950 ramp

primary

#183D6A

secondary

#A0743E

accent

#9C42E6

background

#F6F6F9

surface

#EBECF1

border

#C6C7CB

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #183D6A

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

Preview Lab → · Contrast checker → · Palette generator →