#181B8E#181B8E

#181B8E is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.6% C 0.180 H 269.7°. Best body text is #FFFFFF at 13.24:1 contrast (WCAG AA passes).

Color values

HEX	#181B8E
RGB	rgb(24, 27, 142)
HSL	hsl(238, 71%, 33%)
HSV	hsv(238, 83%, 56%)
CMYK	cmyk(83.1%, 81%, 0%, 44.3%)
CIE-LAB	lab(19.76, 40.98, -62.19)
CIE-LCH	lch(19.76, 74.47, 303.38°)
OKLab	oklab(32.59% -0.0009 -0.1801)
OKLCH	oklch(32.59% 0.18 269.7)
XYZ	xyz(5.6494, 2.9304, 25.8538)
Luminance	0.0293 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B8E #8E8B18

analogous

#18568E #181B8E #50188E

triadic

#181B8E #8E181B #1B8E18

tetradic

#181B8E #8E1856 #8E8B18 #188E50

square

#181B8E #8E1856 #8E8B18 #188E50

split-complementary

#181B8E #8E5018 #568E18

monochromatic

#060725 #0F115A #181B8E #2125C2 #4145DF

Accessibility & contrast

On white

13.24

#181B8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#181B8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B8E

13.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B8E	#FFFFFF	#000000	##FFFFFF
##181B8E	1.00	13.24	1.59	13.24
#FFFFFF	13.24	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003691

Deuteranopia (green-blind)

#002A8C

Tritanopia (blue-blind)

#003F55

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #181b8e;
/* rgb */ color: rgb(24, 27, 142);
/* oklch */ color: oklch(32.6% 0.180 269.7);

Tailwind

colors: {
  custom: {
    50: '#6e5ab0',
    500: '#181b8e',
    950: '#000000',
  },
}

SCSS

$custom: #181b8e;
$custom-light: #6e5ab0;
$custom-dark: #000000;

JSON

{
  "hex": "#181b8e",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 142
  },
  "hsl": {
    "h": 238.475,
    "s": 71.084,
    "l": 32.549
  },
  "oklch": {
    "l": 0.32591,
    "c": 0.18011,
    "h": 269.7
  },
  "luminance": 0.02931
}

Semantic roles & 50–950 ramp

primary

#181B8E

secondary

#C0BC42

accent

#E93AEE

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #181B8E

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

Preview Lab → · Contrast checker → · Palette generator →