#181B6B#181B6B

#181B6B is a dark, vivid blue. Relative luminance 0.020; OKLCH L 28.5% C 0.135 H 272.3°. Best body text is #FFFFFF at 14.91:1 contrast (WCAG AA passes).

Color values

HEX	#181B6B
RGB	rgb(24, 27, 107)
HSL	hsl(238, 63%, 26%)
HSV	hsv(238, 78%, 42%)
CMYK	cmyk(77.6%, 74.8%, 0%, 58%)
CIE-LAB	lab(15.69, 28.49, -46.59)
CIE-LCH	lch(15.69, 54.61, 301.45°)
OKLab	oklab(28.51% 0.0055 -0.1348)
OKLCH	oklch(28.51% 0.135 272.3)
XYZ	xyz(3.4216, 2.0392, 14.1204)
Luminance	0.0204 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B6B #6B6818

analogous

#18446B #181B6B #3E186B

triadic

#181B6B #6B181B #1B6B18

tetradic

#181B6B #6B1844 #6B6818 #186B3E

square

#181B6B #6B1844 #6B6818 #186B3E

split-complementary

#181B6B #6B3E18 #446B18

monochromatic

#060619 #0D0E39 #181B6B #23289D #2E34CF

Accessibility & contrast

On white

14.91

#181B6B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.41

#181B6B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B6B

14.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B6B	#FFFFFF	#000000	##FFFFFF
##181B6B	1.00	14.91	1.41	14.91
#FFFFFF	14.91	1.00	21.00	1.00
#000000	1.41	21.00	1.00	21.00
##FFFFFF	14.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002B6D

Deuteranopia (green-blind)

#00236A

Tritanopia (blue-blind)

#003141

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #181b6b;
/* rgb */ color: rgb(24, 27, 107);
/* oklch */ color: oklch(28.5% 0.135 272.3);

Tailwind

colors: {
  custom: {
    50: '#645896',
    500: '#181b6b',
    950: '#000000',
  },
}

SCSS

$custom: #181b6b;
$custom-light: #645896;
$custom-dark: #000000;

JSON

{
  "hex": "#181b6b",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 107
  },
  "hsl": {
    "h": 237.831,
    "s": 63.359,
    "l": 25.686
  },
  "oklch": {
    "l": 0.2851,
    "c": 0.13492,
    "h": 272.3
  },
  "luminance": 0.0204
}

Semantic roles & 50–950 ramp

primary

#181B6B

secondary

#A19D3E

accent

#E041E6

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06030D

muted

#7A787E

Preview Lab

Preview with #181B6B

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

Preview Lab → · Contrast checker → · Palette generator →