#181F50#181F50

#181F50 is a dark, moderate blue. Relative luminance 0.018; OKLCH L 26.6% C 0.090 H 272.6°. Best body text is #FFFFFF at 15.55:1 contrast (WCAG AA passes).

Color values

HEX	#181F50
RGB	rgb(24, 31, 80)
HSL	hsl(233, 54%, 20%)
HSV	hsv(233, 70%, 31%)
CMYK	cmyk(70%, 61.2%, 0%, 68.6%)
CIE-LAB	lab(14.13, 15.03, -31.12)
CIE-LCH	lch(14.13, 34.56, 295.77°)
OKLab	oklab(26.56% 0.0041 -0.0894)
OKLCH	oklch(26.56% 0.09 272.6)
XYZ	xyz(2.3142, 1.7532, 7.8043)
Luminance	0.0175 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F50 #504918

analogous

#183B50 #181F50 #2D1850

triadic

#181F50 #50181F #1F5018

tetradic

#181F50 #50183B #504918 #18502D

square

#181F50 #50183B #504918 #18502D

split-complementary

#181F50 #502D18 #3B5018

monochromatic

#070918 #0A0D21 #181F50 #26317F #3443AE

Accessibility & contrast

On white

15.55

#181F50 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#181F50 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F50

15.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F50	#FFFFFF	#000000	##FFFFFF
##181F50	1.00	15.55	1.35	15.55
#FFFFFF	15.55	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002652

Deuteranopia (green-blind)

#00214F

Tritanopia (blue-blind)

#002B34

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #181f50;
/* rgb */ color: rgb(24, 31, 80);
/* oklch */ color: oklch(26.6% 0.090 272.6);

Tailwind

colors: {
  custom: {
    50: '#5c5a81',
    500: '#181f50',
    950: '#000000',
  },
}

SCSS

$custom: #181f50;
$custom-light: #5c5a81;
$custom-dark: #000000;

JSON

{
  "hex": "#181f50",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 80
  },
  "hsl": {
    "h": 232.5,
    "s": 53.846,
    "l": 20.392
  },
  "oklch": {
    "l": 0.26561,
    "c": 0.08954,
    "h": 272.6
  },
  "luminance": 0.01753
}

Semantic roles & 50–950 ramp

primary

#181F50

secondary

#877E3D

accent

#CB4BDD

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #181F50

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

Preview Lab → · Contrast checker → · Palette generator →