#181743#181743

#181743 is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 23.6% C 0.081 H 279.2°. Best body text is #FFFFFF at 16.90:1 contrast (WCAG AA passes).

Color values

HEX	#181743
RGB	rgb(24, 23, 67)
HSL	hsl(241, 49%, 18%)
HSV	hsv(241, 66%, 26%)
CMYK	cmyk(64.2%, 65.7%, 0%, 73.7%)
CIE-LAB	lab(10.65, 15.80, -27.78)
CIE-LCH	lch(10.65, 31.96, 299.63°)
OKLab	oklab(23.61% 0.013 -0.0797)
OKLCH	oklch(23.61% 0.081 279.2)
XYZ	xyz(1.6959, 1.2121, 5.4537)
Luminance	0.0121 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181743 #424317

analogous

#172C43 #181743 #2E1743

triadic

#181743 #431817 #174318

tetradic

#181743 #43172C #424317 #17432E

square

#181743 #43172C #424317 #17432E

split-complementary

#181743 #432E17 #2C4317

monochromatic

#080817 #080817 #181743 #282771 #39369E

Accessibility & contrast

On white

16.90

#181743 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#181743 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181743

16.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181743	#FFFFFF	#000000	##FFFFFF
##181743	1.00	16.90	1.24	16.90
#FFFFFF	16.90	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001F44

Deuteranopia (green-blind)

#001B42

Tritanopia (blue-blind)

#03212A

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #181743;
/* rgb */ color: rgb(24, 23, 67);
/* oklch */ color: oklch(23.6% 0.081 279.2);

Tailwind

colors: {
  custom: {
    50: '#5a5477',
    500: '#181743',
    950: '#000000',
  },
}

SCSS

$custom: #181743;
$custom-light: #5a5477;
$custom-dark: #000000;

JSON

{
  "hex": "#181743",
  "rgb": {
    "r": 24,
    "g": 23,
    "b": 67
  },
  "hsl": {
    "h": 241.364,
    "s": 48.889,
    "l": 17.647
  },
  "oklch": {
    "l": 0.23612,
    "c": 0.08076,
    "h": 279.2
  },
  "luminance": 0.01212
}

Semantic roles & 50–950 ramp

primary

#181743

secondary

#797A3C

accent

#D84FD5

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#040209

muted

#79787B

Preview Lab

Preview with #181743

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

Preview Lab → · Contrast checker → · Palette generator →