#181B41#181B41

#181B41 is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.3% C 0.071 H 276.4°. Best body text is #FFFFFF at 16.51:1 contrast (WCAG AA passes).

Color values

HEX	#181B41
RGB	rgb(24, 27, 65)
HSL	hsl(236, 46%, 17%)
HSV	hsv(236, 63%, 25%)
CMYK	cmyk(63.1%, 58.5%, 0%, 74.5%)
CIE-LAB	lab(11.69, 12.00, -24.70)
CIE-LCH	lch(11.69, 27.46, 295.91°)
OKLab	oklab(24.33% 0.0079 -0.0706)
OKLCH	oklch(24.33% 0.071 276.4)
XYZ	xyz(1.7225, 1.3596, 5.1717)
Luminance	0.0136 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B41 #413E18

analogous

#182F41 #181B41 #2A1841

triadic

#181B41 #41181B #1B4118

tetradic

#181B41 #41182F #413E18 #18412A

square

#181B41 #41182F #413E18 #18412A

split-complementary

#181B41 #412A18 #2F4118

monochromatic

#080916 #080916 #181B41 #292E6E #39409A

Accessibility & contrast

On white

16.51

#181B41 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#181B41 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B41

16.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B41	#FFFFFF	#000000	##FFFFFF
##181B41	1.00	16.51	1.27	16.51
#FFFFFF	16.51	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#072142

Deuteranopia (green-blind)

#021D40

Tritanopia (blue-blind)

#04242B

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #181b41;
/* rgb */ color: rgb(24, 27, 65);
/* oklch */ color: oklch(24.3% 0.071 276.4);

Tailwind

colors: {
  custom: {
    50: '#595776',
    500: '#181b41',
    950: '#000000',
  },
}

SCSS

$custom: #181b41;
$custom-light: #595776;
$custom-dark: #000000;

JSON

{
  "hex": "#181b41",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 65
  },
  "hsl": {
    "h": 235.61,
    "s": 46.067,
    "l": 17.451
  },
  "oklch": {
    "l": 0.24334,
    "c": 0.07103,
    "h": 276.4
  },
  "luminance": 0.0136
}

Semantic roles & 50–950 ramp

primary

#181B41

secondary

#78733D

accent

#CC52D6

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#040308

muted

#79787B

Preview Lab

Preview with #181B41

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

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