#181B6E#181B6E

#181B6E is a dark, vivid blue. Relative luminance 0.021; OKLCH L 28.8% C 0.139 H 272.1°. Best body text is #FFFFFF at 14.78:1 contrast (WCAG AA passes).

Color values

HEX	#181B6E
RGB	rgb(24, 27, 110)
HSL	hsl(238, 64%, 26%)
HSV	hsv(238, 78%, 43%)
CMYK	cmyk(78.2%, 75.5%, 0%, 56.9%)
CIE-LAB	lab(16.02, 29.61, -48.01)
CIE-LCH	lch(16.02, 56.41, 301.67°)
OKLab	oklab(28.84% 0.005 -0.1389)
OKLCH	oklch(28.84% 0.139 272.1)
XYZ	xyz(3.5821, 2.1035, 14.9661)
Luminance	0.0210 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B6E #6E6B18

analogous

#18466E #181B6E #40186E

triadic

#181B6E #6E181B #1B6E18

tetradic

#181B6E #6E1846 #6E6B18 #186E40

square

#181B6E #6E1846 #6E6B18 #186E40

split-complementary

#181B6E #6E4018 #466E18

monochromatic

#050619 #0D0F3C #181B6E #2327A0 #2F35D2

Accessibility & contrast

On white

14.78

#181B6E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.42

#181B6E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B6E

14.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B6E	#FFFFFF	#000000	##FFFFFF
##181B6E	1.00	14.78	1.42	14.78
#FFFFFF	14.78	1.00	21.00	1.00
#000000	1.42	21.00	1.00	21.00
##FFFFFF	14.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002C70

Deuteranopia (green-blind)

#00246C

Tritanopia (blue-blind)

#003342

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #181b6e;
/* rgb */ color: rgb(24, 27, 110);
/* oklch */ color: oklch(28.8% 0.139 272.1);

Tailwind

colors: {
  custom: {
    50: '#655899',
    500: '#181b6e',
    950: '#000000',
  },
}

SCSS

$custom: #181b6e;
$custom-light: #655899;
$custom-dark: #000000;

JSON

{
  "hex": "#181b6e",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 110
  },
  "hsl": {
    "h": 237.907,
    "s": 64.179,
    "l": 26.275
  },
  "oklch": {
    "l": 0.28844,
    "c": 0.13902,
    "h": 272.1
  },
  "luminance": 0.02104
}

Semantic roles & 50–950 ramp

primary

#181B6E

secondary

#A4A03E

accent

#E141E7

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06030E

muted

#7A787E

Preview Lab

Preview with #181B6E

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

Preview Lab → · Contrast checker → · Palette generator →