#181B8F#181B8F

#181B8F is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.7% C 0.181 H 269.6°. Best body text is #FFFFFF at 13.19:1 contrast (WCAG AA passes).

Color values

HEX	#181B8F
RGB	rgb(24, 27, 143)
HSL	hsl(238, 71%, 33%)
HSV	hsv(238, 83%, 56%)
CMYK	cmyk(83.2%, 81.1%, 0%, 43.9%)
CIE-LAB	lab(19.89, 41.32, -62.61)
CIE-LCH	lch(19.89, 75.01, 303.42°)
OKLab	oklab(32.71% -0.0011 -0.1813)
OKLCH	oklch(32.71% 0.181 269.6)
XYZ	xyz(5.7249, 2.9606, 26.2510)
Luminance	0.0296 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B8F #8F8C18

analogous

#18578F #181B8F #50188F

triadic

#181B8F #8F181B #1B8F18

tetradic

#181B8F #8F1857 #8F8C18 #188F50

square

#181B8F #8F1857 #8F8C18 #188F50

split-complementary

#181B8F #8F5018 #578F18

monochromatic

#060726 #0F115B #181B8F #2125C3 #4246DF

Accessibility & contrast

On white

13.19

#181B8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#181B8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B8F

13.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B8F	#FFFFFF	#000000	##FFFFFF
##181B8F	1.00	13.19	1.59	13.19
#FFFFFF	13.19	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003692

Deuteranopia (green-blind)

#002A8D

Tritanopia (blue-blind)

#003F55

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #181b8f;
/* rgb */ color: rgb(24, 27, 143);
/* oklch */ color: oklch(32.7% 0.181 269.6);

Tailwind

colors: {
  custom: {
    50: '#6e5ab1',
    500: '#181b8f',
    950: '#000000',
  },
}

SCSS

$custom: #181b8f;
$custom-light: #6e5ab1;
$custom-dark: #000000;

JSON

{
  "hex": "#181b8f",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 143
  },
  "hsl": {
    "h": 238.487,
    "s": 71.257,
    "l": 32.745
  },
  "oklch": {
    "l": 0.32712,
    "c": 0.18132,
    "h": 269.6
  },
  "luminance": 0.02961
}

Semantic roles & 50–950 ramp

primary

#181B8F

secondary

#C0BD43

accent

#E93AEE

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #181B8F

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

Preview Lab → · Contrast checker → · Palette generator →