#181540#181540

#181540 is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.9% C 0.079 H 281.3°. Best body text is #FFFFFF at 17.21:1 contrast (WCAG AA passes).

Color values

HEX	#181540
RGB	rgb(24, 21, 64)
HSL	hsl(244, 51%, 17%)
HSV	hsv(244, 67%, 25%)
CMYK	cmyk(62.5%, 67.2%, 0%, 74.9%)
CIE-LAB	lab(9.80, 16.12, -27.03)
CIE-LCH	lch(9.80, 31.47, 300.81°)
OKLab	oklab(22.91% 0.0155 -0.0775)
OKLCH	oklch(22.91% 0.079 281.3)
XYZ	xyz(1.5700, 1.1006, 4.9792)
Luminance	0.0110 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181540 #3D4015

analogous

#152840 #181540 #2E1540

triadic

#181540 #401815 #154018

tetradic

#181540 #401528 #3D4015 #15402E

square

#181540 #401528 #3D4015 #15402E

split-complementary

#181540 #402E15 #284015

monochromatic

#090817 #090817 #181540 #29246E #3B339C

Accessibility & contrast

On white

17.21

#181540 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#181540 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181540

17.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181540	#FFFFFF	#000000	##FFFFFF
##181540	1.00	17.21	1.22	17.21
#FFFFFF	17.21	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D41

Deuteranopia (green-blind)

#001A3F

Tritanopia (blue-blind)

#061F28

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #181540;
/* rgb */ color: rgb(24, 21, 64);
/* oklch */ color: oklch(22.9% 0.079 281.3);

Tailwind

colors: {
  custom: {
    50: '#595275',
    500: '#181540',
    950: '#000000',
  },
}

SCSS

$custom: #181540;
$custom-light: #595275;
$custom-dark: #000000;

JSON

{
  "hex": "#181540",
  "rgb": {
    "r": 24,
    "g": 21,
    "b": 64
  },
  "hsl": {
    "h": 244.186,
    "s": 50.588,
    "l": 16.667
  },
  "oklch": {
    "l": 0.22905,
    "c": 0.07905,
    "h": 281.3
  },
  "luminance": 0.01101
}

Semantic roles & 50–950 ramp

primary

#181540

secondary

#737839

accent

#DA4ED0

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#040208

muted

#79787B

Preview Lab

Preview with #181540

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

Preview Lab → · Contrast checker → · Palette generator →