#181554#181554

#181554 is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.9% C 0.110 H 277.0°. Best body text is #FFFFFF at 16.48:1 contrast (WCAG AA passes).

Color values

HEX	#181554
RGB	rgb(24, 21, 84)
HSL	hsl(243, 60%, 21%)
HSV	hsv(243, 75%, 33%)
CMYK	cmyk(71.4%, 75%, 0%, 67.1%)
CIE-LAB	lab(11.76, 23.80, -37.72)
CIE-LCH	lch(11.76, 44.60, 302.25°)
OKLab	oklab(24.94% 0.0133 -0.1089)
OKLCH	oklch(24.94% 0.11 277)
XYZ	xyz(2.2446, 1.3704, 8.5320)
Luminance	0.0137 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181554 #515415

analogous

#153154 #181554 #371554

triadic

#181554 #541815 #155418

tetradic

#181554 #541531 #515415 #155437

square

#181554 #541531 #515415 #155437

split-complementary

#181554 #543715 #315415

monochromatic

#070618 #0A0923 #181554 #262185 #342DB6

Accessibility & contrast

On white

16.48

#181554 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#181554 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181554

16.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181554	#FFFFFF	#000000	##FFFFFF
##181554	1.00	16.48	1.27	16.48
#FFFFFF	16.48	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002256

Deuteranopia (green-blind)

#001C53

Tritanopia (blue-blind)

#002632

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #181554;
/* rgb */ color: rgb(24, 21, 84);
/* oklch */ color: oklch(24.9% 0.110 277.0);

Tailwind

colors: {
  custom: {
    50: '#5e5385',
    500: '#181554',
    950: '#000000',
  },
}

SCSS

$custom: #181554;
$custom-light: #5e5385;
$custom-dark: #000000;

JSON

{
  "hex": "#181554",
  "rgb": {
    "r": 24,
    "g": 21,
    "b": 84
  },
  "hsl": {
    "h": 242.857,
    "s": 60,
    "l": 20.588
  },
  "oklch": {
    "l": 0.24935,
    "c": 0.1097,
    "h": 277
  },
  "luminance": 0.01371
}

Semantic roles & 50–950 ramp

primary

#181554

secondary

#888C39

accent

#E345DC

background

#F5F4F8

surface

#EAE7EF

border

#C6C3CA

text

#05020B

muted

#79787C

Preview Lab

Preview with #181554

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

Preview Lab → · Contrast checker → · Palette generator →