#181B8B#181B8B

#181B8B is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.2% C 0.176 H 269.9°. Best body text is #FFFFFF at 13.39:1 contrast (WCAG AA passes).

Color values

HEX	#181B8B
RGB	rgb(24, 27, 139)
HSL	hsl(238, 71%, 32%)
HSV	hsv(238, 83%, 55%)
CMYK	cmyk(82.7%, 80.6%, 0%, 45.5%)
CIE-LAB	lab(19.40, 39.96, -60.92)
CIE-LCH	lch(19.40, 72.86, 303.26°)
OKLab	oklab(32.23% -0.0003 -0.1764)
OKLCH	oklch(32.23% 0.176 269.9)
XYZ	xyz(5.4272, 2.8415, 24.6835)
Luminance	0.0284 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B8B #8B8818

analogous

#18558B #181B8B #4F188B

triadic

#181B8B #8B181B #1B8B18

tetradic

#181B8B #8B1855 #8B8818 #188B4F

square

#181B8B #8B1855 #8B8818 #188B4F

split-complementary

#181B8B #8B4F18 #558B18

monochromatic

#060723 #0F1157 #181B8B #2125BF #3F44DE

Accessibility & contrast

On white

13.39

#181B8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#181B8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B8B

13.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B8B	#FFFFFF	#000000	##FFFFFF
##181B8B	1.00	13.39	1.57	13.39
#FFFFFF	13.39	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00358E

Deuteranopia (green-blind)

#002989

Tritanopia (blue-blind)

#003E53

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #181b8b;
/* rgb */ color: rgb(24, 27, 139);
/* oklch */ color: oklch(32.2% 0.176 269.9);

Tailwind

colors: {
  custom: {
    50: '#6d5aae',
    500: '#181b8b',
    950: '#000000',
  },
}

SCSS

$custom: #181b8b;
$custom-light: #6d5aae;
$custom-dark: #000000;

JSON

{
  "hex": "#181b8b",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 139
  },
  "hsl": {
    "h": 238.435,
    "s": 70.552,
    "l": 31.961
  },
  "oklch": {
    "l": 0.32229,
    "c": 0.17644,
    "h": 269.9
  },
  "luminance": 0.02842
}

Semantic roles & 50–950 ramp

primary

#181B8B

secondary

#BEBB40

accent

#E93AED

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#080410

muted

#7B797F

Preview Lab

Preview with #181B8B

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

Preview Lab → · Contrast checker → · Palette generator →