#181D3F#181D3F

#181D3F is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.6% C 0.064 H 274.4°. Best body text is #FFFFFF at 16.32:1 contrast (WCAG AA passes).

Color values

HEX	#181D3F
RGB	rgb(24, 29, 63)
HSL	hsl(232, 45%, 17%)
HSV	hsv(232, 62%, 25%)
CMYK	cmyk(61.9%, 54%, 0%, 75.3%)
CIE-LAB	lab(12.17, 9.68, -22.52)
CIE-LCH	lch(12.17, 24.51, 293.27°)
OKLab	oklab(24.65% 0.0049 -0.0642)
OKLCH	oklch(24.65% 0.064 274.4)
XYZ	xyz(1.7130, 1.4317, 4.8877)
Luminance	0.0143 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D3F #3F3A18

analogous

#18313F #181D3F #27183F

triadic

#181D3F #3F181D #1D3F18

tetradic

#181D3F #3F1831 #3F3A18 #183F27

square

#181D3F #3F1831 #3F3A18 #183F27

split-complementary

#181D3F #3F2718 #313F18

monochromatic

#080A16 #080A16 #181D3F #29316B #3A4698

Accessibility & contrast

On white

16.32

#181D3F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.29

#181D3F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D3F

16.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D3F	#FFFFFF	#000000	##FFFFFF
##181D3F	1.00	16.32	1.29	16.32
#FFFFFF	16.32	1.00	21.00	1.00
#000000	1.29	21.00	1.00	21.00
##FFFFFF	16.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D2240

Deuteranopia (green-blind)

#091E3E

Tritanopia (blue-blind)

#05242A

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #181d3f;
/* rgb */ color: rgb(24, 29, 63);
/* oklch */ color: oklch(24.6% 0.064 274.4);

Tailwind

colors: {
  custom: {
    50: '#595874',
    500: '#181d3f',
    950: '#000000',
  },
}

SCSS

$custom: #181d3f;
$custom-light: #595874;
$custom-dark: #000000;

JSON

{
  "hex": "#181d3f",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 63
  },
  "hsl": {
    "h": 232.308,
    "s": 44.828,
    "l": 17.059
  },
  "oklch": {
    "l": 0.24649,
    "c": 0.06435,
    "h": 274.4
  },
  "luminance": 0.01432
}

Semantic roles & 50–950 ramp

primary

#181D3F

secondary

#756E3D

accent

#C453D5

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#030308

muted

#78787B

Preview Lab

Preview with #181D3F

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

Preview Lab → · Contrast checker → · Palette generator →