#181F7B#181F7B

#181F7B is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.0% C 0.152 H 270.4°. Best body text is #FFFFFF at 13.81:1 contrast (WCAG AA passes).

Color values

HEX	#181F7B
RGB	rgb(24, 31, 123)
HSL	hsl(236, 67%, 29%)
HSV	hsv(236, 80%, 48%)
CMYK	cmyk(80.5%, 74.8%, 0%, 51.8%)
CIE-LAB	lab(18.38, 31.89, -52.49)
CIE-LCH	lch(18.38, 61.42, 301.28°)
OKLab	oklab(30.96% 0.001 -0.152)
OKLCH	oklch(30.96% 0.152 270.4)
XYZ	xyz(4.4406, 2.6037, 19.0036)
Luminance	0.0260 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F7B #7B7418

analogous

#18517B #181F7B #43187B

triadic

#181F7B #7B181F #1F7B18

tetradic

#181F7B #7B1851 #7B7418 #187B43

square

#181F7B #7B1851 #7B7418 #187B43

split-complementary

#181F7B #7B4318 #517B18

monochromatic

#05061A #0E1248 #181F7B #222CAE #3641D8

Accessibility & contrast

On white

13.81

#181F7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#181F7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F7B

13.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F7B	#FFFFFF	#000000	##FFFFFF
##181F7B	1.00	13.81	1.52	13.81
#FFFFFF	13.81	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00327E

Deuteranopia (green-blind)

#002879

Tritanopia (blue-blind)

#00394B

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #181f7b;
/* rgb */ color: rgb(24, 31, 123);
/* oklch */ color: oklch(31.0% 0.152 270.4);

Tailwind

colors: {
  custom: {
    50: '#685ba2',
    500: '#181f7b',
    950: '#000000',
  },
}

SCSS

$custom: #181f7b;
$custom-light: #685ba2;
$custom-dark: #000000;

JSON

{
  "hex": "#181f7b",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 123
  },
  "hsl": {
    "h": 235.758,
    "s": 67.347,
    "l": 28.824
  },
  "oklch": {
    "l": 0.30963,
    "c": 0.152,
    "h": 270.4
  },
  "luminance": 0.02604
}

Semantic roles & 50–950 ramp

primary

#181F7B

secondary

#B0A83F

accent

#DE3EEA

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #181F7B

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

Preview Lab → · Contrast checker → · Palette generator →