#181538#181538

#181538 is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 22.2% C 0.066 H 283.5°. Best body text is #FFFFFF at 17.45:1 contrast (WCAG AA passes).

Color values

HEX	#181538
RGB	rgb(24, 21, 56)
HSL	hsl(245, 45%, 15%)
HSV	hsv(245, 63%, 22%)
CMYK	cmyk(57.1%, 62.5%, 0%, 78%)
CIE-LAB	lab(9.12, 13.05, -22.41)
CIE-LCH	lch(9.12, 25.93, 300.20°)
OKLab	oklab(22.19% 0.0154 -0.0639)
OKLCH	oklch(22.19% 0.066 283.5)
XYZ	xyz(1.3584, 1.0160, 3.8651)
Luminance	0.0102 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.89

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181538 #353815

analogous

#152338 #181538 #2A1538

triadic

#181538 #381815 #153818

tetradic

#181538 #381523 #353815 #15382A

square

#181538 #381523 #353815 #15382A

split-complementary

#181538 #382A15 #233815

monochromatic

#0A0816 #0A0816 #181538 #2B2665 #3E3691

Accessibility & contrast

On white

17.45

#181538 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.20

#181538 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181538

17.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181538	#FFFFFF	#000000	##FFFFFF
##181538	1.00	17.45	1.20	17.45
#FFFFFF	17.45	1.00	21.00	1.00
#000000	1.20	21.00	1.00	21.00
##FFFFFF	17.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#041B39

Deuteranopia (green-blind)

#031937

Tritanopia (blue-blind)

#0C1D24

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #181538;
/* rgb */ color: rgb(24, 21, 56);
/* oklch */ color: oklch(22.2% 0.066 283.5);

Tailwind

colors: {
  custom: {
    50: '#58526f',
    500: '#181538',
    950: '#000000',
  },
}

SCSS

$custom: #181538;
$custom-light: #58526f;
$custom-dark: #000000;

JSON

{
  "hex": "#181538",
  "rgb": {
    "r": 24,
    "g": 21,
    "b": 56
  },
  "hsl": {
    "h": 245.143,
    "s": 45.455,
    "l": 15.098
  },
  "oklch": {
    "l": 0.22186,
    "c": 0.06575,
    "h": 283.5
  },
  "luminance": 0.01016
}

Semantic roles & 50–950 ramp

primary

#181538

secondary

#6B6F3A

accent

#D553CA

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030207

muted

#78787A

Preview Lab

Preview with #181538

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

Preview Lab → · Contrast checker → · Palette generator →