#181B6C#181B6C

#181B6C is a dark, vivid blue. Relative luminance 0.021; OKLCH L 28.6% C 0.136 H 272.2°. Best body text is #FFFFFF at 14.87:1 contrast (WCAG AA passes).

Color values

HEX	#181B6C
RGB	rgb(24, 27, 108)
HSL	hsl(238, 64%, 26%)
HSV	hsv(238, 78%, 42%)
CMYK	cmyk(77.8%, 75%, 0%, 57.6%)
CIE-LAB	lab(15.80, 28.87, -47.07)
CIE-LCH	lch(15.80, 55.21, 301.52°)
OKLab	oklab(28.62% 0.0053 -0.1362)
OKLCH	oklch(28.62% 0.136 272.2)
XYZ	xyz(3.4745, 2.0604, 14.3990)
Luminance	0.0206 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B6C #6C6918

analogous

#18456C #181B6C #3F186C

triadic

#181B6C #6C181B #1B6C18

tetradic

#181B6C #6C1845 #6C6918 #186C3F

square

#181B6C #6C1845 #6C6918 #186C3F

split-complementary

#181B6C #6C3F18 #456C18

monochromatic

#060619 #0D0E3A #181B6C #23289E #2E34D0

Accessibility & contrast

On white

14.87

#181B6C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.41

#181B6C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B6C

14.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B6C	#FFFFFF	#000000	##FFFFFF
##181B6C	1.00	14.87	1.41	14.87
#FFFFFF	14.87	1.00	21.00	1.00
#000000	1.41	21.00	1.00	21.00
##FFFFFF	14.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002B6E

Deuteranopia (green-blind)

#00236B

Tritanopia (blue-blind)

#003241

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #181b6c;
/* rgb */ color: rgb(24, 27, 108);
/* oklch */ color: oklch(28.6% 0.136 272.2);

Tailwind

colors: {
  custom: {
    50: '#645897',
    500: '#181b6c',
    950: '#000000',
  },
}

SCSS

$custom: #181b6c;
$custom-light: #645897;
$custom-dark: #000000;

JSON

{
  "hex": "#181b6c",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 108
  },
  "hsl": {
    "h": 237.857,
    "s": 63.636,
    "l": 25.882
  },
  "oklch": {
    "l": 0.28621,
    "c": 0.13629,
    "h": 272.2
  },
  "luminance": 0.02061
}

Semantic roles & 50–950 ramp

primary

#181B6C

secondary

#A29E3E

accent

#E141E7

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06030E

muted

#7A787E

Preview Lab

Preview with #181B6C

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

Preview Lab → · Contrast checker → · Palette generator →