#181555#181555

#181555 is a dark, moderate blue. Relative luminance 0.014; OKLCH L 25.0% C 0.111 H 276.8°. Best body text is #FFFFFF at 16.44:1 contrast (WCAG AA passes).

Color values

HEX	#181555
RGB	rgb(24, 21, 85)
HSL	hsl(243, 60%, 21%)
HSV	hsv(243, 75%, 33%)
CMYK	cmyk(71.8%, 75.3%, 0%, 66.7%)
CIE-LAB	lab(11.87, 24.18, -38.23)
CIE-LCH	lch(11.87, 45.23, 302.31°)
OKLab	oklab(25.04% 0.0132 -0.1104)
OKLCH	oklch(25.04% 0.111 276.8)
XYZ	xyz(2.2840, 1.3862, 8.7398)
Luminance	0.0139 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181555 #525515

analogous

#153255 #181555 #381555

triadic

#181555 #551815 #155518

tetradic

#181555 #551532 #525515 #155538

square

#181555 #551532 #525515 #155538

split-complementary

#181555 #553815 #325515

monochromatic

#070619 #0A0924 #181555 #262186 #342DB7

Accessibility & contrast

On white

16.44

#181555 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#181555 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181555

16.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181555	#FFFFFF	#000000	##FFFFFF
##181555	1.00	16.44	1.28	16.44
#FFFFFF	16.44	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002257

Deuteranopia (green-blind)

#001C54

Tritanopia (blue-blind)

#002633

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #181555;
/* rgb */ color: rgb(24, 21, 85);
/* oklch */ color: oklch(25.0% 0.111 276.8);

Tailwind

colors: {
  custom: {
    50: '#5f5386',
    500: '#181555',
    950: '#000000',
  },
}

SCSS

$custom: #181555;
$custom-light: #5f5386;
$custom-dark: #000000;

JSON

{
  "hex": "#181555",
  "rgb": {
    "r": 24,
    "g": 21,
    "b": 85
  },
  "hsl": {
    "h": 242.813,
    "s": 60.377,
    "l": 20.784
  },
  "oklch": {
    "l": 0.25044,
    "c": 0.11115,
    "h": 276.8
  },
  "luminance": 0.01386
}

Semantic roles & 50–950 ramp

primary

#181555

secondary

#898D39

accent

#E444DC

background

#F5F4F8

surface

#EAE7EF

border

#C6C3CA

text

#05020B

muted

#79787C

Preview Lab

Preview with #181555

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

Preview Lab → · Contrast checker → · Palette generator →