#181550#181550

#181550 is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 24.5% C 0.104 H 277.7°. Best body text is #FFFFFF at 16.64:1 contrast (WCAG AA passes).

Color values

HEX	#181550
RGB	rgb(24, 21, 80)
HSL	hsl(243, 58%, 20%)
HSV	hsv(243, 74%, 31%)
CMYK	cmyk(70%, 73.7%, 0%, 68.6%)
CIE-LAB	lab(11.34, 22.28, -35.67)
CIE-LCH	lch(11.34, 42.06, 301.99°)
OKLab	oklab(24.51% 0.014 -0.1029)
OKLCH	oklch(24.51% 0.104 277.7)
XYZ	xyz(2.0924, 1.3095, 7.7304)
Luminance	0.0131 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.98

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181550 #4D5015

analogous

#153050 #181550 #361550

triadic

#181550 #501815 #155018

tetradic

#181550 #501530 #4D5015 #155036

square

#181550 #501530 #4D5015 #155036

split-complementary

#181550 #503615 #305015

monochromatic

#070618 #090820 #181550 #272280 #352EB1

Accessibility & contrast

On white

16.64

#181550 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#181550 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181550

16.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181550	#FFFFFF	#000000	##FFFFFF
##181550	1.00	16.64	1.26	16.64
#FFFFFF	16.64	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002152

Deuteranopia (green-blind)

#001C4F

Tritanopia (blue-blind)

#002530

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #181550;
/* rgb */ color: rgb(24, 21, 80);
/* oklch */ color: oklch(24.5% 0.104 277.7);

Tailwind

colors: {
  custom: {
    50: '#5d5282',
    500: '#181550',
    950: '#000000',
  },
}

SCSS

$custom: #181550;
$custom-light: #5d5282;
$custom-dark: #000000;

JSON

{
  "hex": "#181550",
  "rgb": {
    "r": 24,
    "g": 21,
    "b": 80
  },
  "hsl": {
    "h": 243.051,
    "s": 58.416,
    "l": 19.804
  },
  "oklch": {
    "l": 0.24507,
    "c": 0.10383,
    "h": 277.7
  },
  "luminance": 0.0131
}

Semantic roles & 50–950 ramp

primary

#181550

secondary

#848839

accent

#E246DA

background

#F5F4F8

surface

#E9E7EF

border

#C5C3CA

text

#05020A

muted

#79787C

Preview Lab

Preview with #181550

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

Preview Lab → · Contrast checker → · Palette generator →