#181B50#181B50

#181B50 is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.7% C 0.095 H 275.0°. Best body text is #FFFFFF at 16.01:1 contrast (WCAG AA passes).

Color values

HEX	#181B50
RGB	rgb(24, 27, 80)
HSL	hsl(237, 54%, 20%)
HSV	hsv(237, 70%, 31%)
CMYK	cmyk(70%, 66.3%, 0%, 68.6%)
CIE-LAB	lab(12.97, 17.99, -33.02)
CIE-LCH	lch(12.97, 37.60, 298.58°)
OKLab	oklab(25.69% 0.0083 -0.0951)
OKLCH	oklch(25.69% 0.095 275)
XYZ	xyz(2.2161, 1.5571, 7.7716)
Luminance	0.0156 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.51

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B50 #504D18

analogous

#183750 #181B50 #311850

triadic

#181B50 #50181B #1B5018

tetradic

#181B50 #501837 #504D18 #185031

square

#181B50 #501837 #504D18 #185031

split-complementary

#181B50 #503118 #375018

monochromatic

#070818 #0A0B21 #181B50 #262B7F #343BAE

Accessibility & contrast

On white

16.01

#181B50 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#181B50 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B50

16.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B50	#FFFFFF	#000000	##FFFFFF
##181B50	1.00	16.01	1.31	16.01
#FFFFFF	16.01	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	16.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002452

Deuteranopia (green-blind)

#001F4F

Tritanopia (blue-blind)

#002832

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #181b50;
/* rgb */ color: rgb(24, 27, 80);
/* oklch */ color: oklch(25.7% 0.095 275.0);

Tailwind

colors: {
  custom: {
    50: '#5d5782',
    500: '#181b50',
    950: '#000000',
  },
}

SCSS

$custom: #181b50;
$custom-light: #5d5782;
$custom-dark: #000000;

JSON

{
  "hex": "#181b50",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 80
  },
  "hsl": {
    "h": 236.786,
    "s": 53.846,
    "l": 20.392
  },
  "oklch": {
    "l": 0.25693,
    "c": 0.09543,
    "h": 275
  },
  "luminance": 0.01557
}

Semantic roles & 50–950 ramp

primary

#181B50

secondary

#87833D

accent

#D54BDD

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030A

muted

#79787C

Preview Lab

Preview with #181B50

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

Preview Lab → · Contrast checker → · Palette generator →