#181B3E#181B3E

#181B3E is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 24.1% C 0.066 H 276.6°. Best body text is #FFFFFF at 16.60:1 contrast (WCAG AA passes).

Color values

HEX	#181B3E
RGB	rgb(24, 27, 62)
HSL	hsl(235, 44%, 17%)
HSV	hsv(235, 61%, 24%)
CMYK	cmyk(61.3%, 56.5%, 0%, 75.7%)
CIE-LAB	lab(11.45, 10.81, -22.95)
CIE-LCH	lch(11.45, 25.37, 295.21°)
OKLab	oklab(24.09% 0.0075 -0.0655)
OKLCH	oklch(24.09% 0.066 276.6)
XYZ	xyz(1.6378, 1.3258, 4.7261)
Luminance	0.0133 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B3E #3E3B18

analogous

#182E3E #181B3E #28183E

triadic

#181B3E #3E181B #1B3E18

tetradic

#181B3E #3E182E #3E3B18 #183E28

square

#181B3E #3E182E #3E3B18 #183E28

split-complementary

#181B3E #3E2818 #2E3E18

monochromatic

#090A16 #090A16 #181B3E #292E6A #3A4196

Accessibility & contrast

On white

16.60

#181B3E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#181B3E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B3E

16.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B3E	#FFFFFF	#000000	##FFFFFF
##181B3E	1.00	16.60	1.27	16.60
#FFFFFF	16.60	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A203F

Deuteranopia (green-blind)

#061D3D

Tritanopia (blue-blind)

#072329

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #181b3e;
/* rgb */ color: rgb(24, 27, 62);
/* oklch */ color: oklch(24.1% 0.066 276.6);

Tailwind

colors: {
  custom: {
    50: '#595773',
    500: '#181b3e',
    950: '#000000',
  },
}

SCSS

$custom: #181b3e;
$custom-light: #595773;
$custom-dark: #000000;

JSON

{
  "hex": "#181b3e",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 62
  },
  "hsl": {
    "h": 235.263,
    "s": 44.186,
    "l": 16.863
  },
  "oklch": {
    "l": 0.24085,
    "c": 0.06589,
    "h": 276.6
  },
  "luminance": 0.01326
}

Semantic roles & 50–950 ramp

primary

#181B3E

secondary

#74703D

accent

#CA54D4

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#030308

muted

#78787B

Preview Lab

Preview with #181B3E

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

Preview Lab → · Contrast checker → · Palette generator →