#181F80#181F80

#181F80 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.5% C 0.159 H 270.1°. Best body text is #FFFFFF at 13.58:1 contrast (WCAG AA passes).

Color values

HEX	#181F80
RGB	rgb(24, 31, 128)
HSL	hsl(236, 68%, 30%)
HSV	hsv(236, 81%, 50%)
CMYK	cmyk(81.3%, 75.8%, 0%, 49.8%)
CIE-LAB	lab(18.94, 33.73, -54.75)
CIE-LCH	lch(18.94, 64.31, 301.63°)
OKLab	oklab(31.53% 0.0002 -0.1586)
OKLCH	oklch(31.53% 0.159 270.1)
XYZ	xyz(4.7616, 2.7321, 20.6943)
Luminance	0.0273 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F80 #807918

analogous

#185380 #181F80 #451880

triadic

#181F80 #80181F #1F8018

tetradic

#181F80 #801853 #807918 #188045

square

#181F80 #801853 #807918 #188045

split-complementary

#181F80 #804518 #538018

monochromatic

#05061A #0E134C #181F80 #222BB4 #3943DA

Accessibility & contrast

On white

13.58

#181F80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#181F80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F80

13.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F80	#FFFFFF	#000000	##FFFFFF
##181F80	1.00	13.58	1.55	13.58
#FFFFFF	13.58	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003383

Deuteranopia (green-blind)

#00297E

Tritanopia (blue-blind)

#003B4D

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #181f80;
/* rgb */ color: rgb(24, 31, 128);
/* oklch */ color: oklch(31.5% 0.159 270.1);

Tailwind

colors: {
  custom: {
    50: '#695ba6',
    500: '#181f80',
    950: '#000000',
  },
}

SCSS

$custom: #181f80;
$custom-light: #695ba6;
$custom-dark: #000000;

JSON

{
  "hex": "#181f80",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 128
  },
  "hsl": {
    "h": 235.962,
    "s": 68.421,
    "l": 29.804
  },
  "oklch": {
    "l": 0.31527,
    "c": 0.15859,
    "h": 270.1
  },
  "luminance": 0.02733
}

Semantic roles & 50–950 ramp

primary

#181F80

secondary

#B4AC40

accent

#E03DEB

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#08040F

muted

#7A797F

Preview Lab

Preview with #181F80

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

Preview Lab → · Contrast checker → · Palette generator →