#181740#181740

#181740 is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 23.3% C 0.076 H 279.8°. Best body text is #FFFFFF at 17.00:1 contrast (WCAG AA passes).

Color values

HEX	#181740
RGB	rgb(24, 23, 64)
HSL	hsl(241, 47%, 17%)
HSV	hsv(241, 64%, 25%)
CMYK	cmyk(62.5%, 64.1%, 0%, 74.9%)
CIE-LAB	lab(10.39, 14.63, -26.09)
CIE-LCH	lch(10.39, 29.91, 299.28°)
OKLab	oklab(23.34% 0.013 -0.0747)
OKLCH	oklch(23.34% 0.076 279.8)
XYZ	xyz(1.6082, 1.1770, 4.9919)
Luminance	0.0118 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.37

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181740 #3F4017

analogous

#172B40 #181740 #2D1740

triadic

#181740 #401817 #174018

tetradic

#181740 #40172B #3F4017 #17402D

square

#181740 #40172B #3F4017 #17402D

split-complementary

#181740 #402D17 #2B4017

monochromatic

#080817 #080817 #181740 #29276D #3A379A

Accessibility & contrast

On white

17.00

#181740 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#181740 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181740

17.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181740	#FFFFFF	#000000	##FFFFFF
##181740	1.00	17.00	1.24	17.00
#FFFFFF	17.00	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	17.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001E41

Deuteranopia (green-blind)

#001B3F

Tritanopia (blue-blind)

#052128

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #181740;
/* rgb */ color: rgb(24, 23, 64);
/* oklch */ color: oklch(23.3% 0.076 279.8);

Tailwind

colors: {
  custom: {
    50: '#595375',
    500: '#181740',
    950: '#000000',
  },
}

SCSS

$custom: #181740;
$custom-light: #595375;
$custom-dark: #000000;

JSON

{
  "hex": "#181740",
  "rgb": {
    "r": 24,
    "g": 23,
    "b": 64
  },
  "hsl": {
    "h": 241.463,
    "s": 47.126,
    "l": 17.059
  },
  "oklch": {
    "l": 0.23337,
    "c": 0.07584,
    "h": 279.8
  },
  "luminance": 0.01177
}

Semantic roles & 50–950 ramp

primary

#181740

secondary

#75773C

accent

#D751D3

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#040208

muted

#79787B

Preview Lab

Preview with #181740

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

Preview Lab → · Contrast checker → · Palette generator →