#181B7B#181B7B

#181B7B is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.3% C 0.156 H 271.0°. Best body text is #FFFFFF at 14.17:1 contrast (WCAG AA passes).

Color values

HEX	#181B7B
RGB	rgb(24, 27, 123)
HSL	hsl(238, 67%, 29%)
HSV	hsv(238, 80%, 48%)
CMYK	cmyk(80.5%, 78%, 0%, 51.8%)
CIE-LAB	lab(17.50, 34.37, -53.95)
CIE-LCH	lch(17.50, 63.97, 302.50°)
OKLab	oklab(30.33% 0.0027 -0.1562)
OKLCH	oklch(30.33% 0.156 271)
XYZ	xyz(4.3426, 2.4076, 18.9709)
Luminance	0.0241 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B7B #7B7818

analogous

#184D7B #181B7B #47187B

triadic

#181B7B #7B181B #1B7B18

tetradic

#181B7B #7B184D #7B7818 #187B47

square

#181B7B #7B184D #7B7818 #187B47

split-complementary

#181B7B #7B4718 #4D7B18

monochromatic

#05061A #0E1048 #181B7B #2226AE #363BD8

Accessibility & contrast

On white

14.17

#181B7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#181B7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B7B

14.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B7B	#FFFFFF	#000000	##FFFFFF
##181B7B	1.00	14.17	1.48	14.17
#FFFFFF	14.17	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00307E

Deuteranopia (green-blind)

#002679

Tritanopia (blue-blind)

#00374A

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #181b7b;
/* rgb */ color: rgb(24, 27, 123);
/* oklch */ color: oklch(30.3% 0.156 271.0);

Tailwind

colors: {
  custom: {
    50: '#6859a2',
    500: '#181b7b',
    950: '#000000',
  },
}

SCSS

$custom: #181b7b;
$custom-light: #6859a2;
$custom-dark: #000000;

JSON

{
  "hex": "#181b7b",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 123
  },
  "hsl": {
    "h": 238.182,
    "s": 67.347,
    "l": 28.824
  },
  "oklch": {
    "l": 0.30332,
    "c": 0.15625,
    "h": 271
  },
  "luminance": 0.02408
}

Semantic roles & 50–950 ramp

primary

#181B7B

secondary

#B0AC3F

accent

#E53EEA

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07030F

muted

#7A787F

Preview Lab

Preview with #181B7B

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

Preview Lab → · Contrast checker → · Palette generator →