#183B86#183B86

#183B86 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.5% C 0.132 H 262.9°. Best body text is #FFFFFF at 10.46:1 contrast (WCAG AA passes).

Color values

HEX	#183B86
RGB	rgb(24, 59, 134)
HSL	hsl(221, 70%, 31%)
HSV	hsv(221, 82%, 53%)
CMYK	cmyk(82.1%, 56%, 0%, 47.5%)
CIE-LAB	lab(26.86, 17.01, -45.56)
CIE-LCH	lch(26.86, 48.63, 290.47°)
OKLab	oklab(37.54% -0.0165 -0.1314)
OKLCH	oklch(37.54% 0.132 262.9)
XYZ	xyz(6.2422, 5.0426, 23.1940)
Luminance	0.0504 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B86 #866318

analogous

#187286 #183B86 #2C1886

triadic

#183B86 #86183B #3B8618

tetradic

#183B86 #861872 #866318 #18862C

square

#183B86 #861872 #866318 #18862C

split-complementary

#183B86 #862C18 #728618

monochromatic

#050D1E #0F2452 #183B86 #2152BA #3C6FDC

Accessibility & contrast

On white

10.46

#183B86 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#183B86 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B86

10.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B86	#FFFFFF	#000000	##FFFFFF
##183B86	1.00	10.46	2.01	10.46
#FFFFFF	10.46	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004589

Deuteranopia (green-blind)

#003B85

Tritanopia (blue-blind)

#004D5A

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #183b86;
/* rgb */ color: rgb(24, 59, 134);
/* oklch */ color: oklch(37.5% 0.132 262.9);

Tailwind

colors: {
  custom: {
    50: '#6870aa',
    500: '#183b86',
    950: '#000000',
  },
}

SCSS

$custom: #183b86;
$custom-light: #6870aa;
$custom-dark: #000000;

JSON

{
  "hex": "#183b86",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 134
  },
  "hsl": {
    "h": 220.909,
    "s": 69.62,
    "l": 30.98
  },
  "oklch": {
    "l": 0.37541,
    "c": 0.13244,
    "h": 262.9
  },
  "luminance": 0.05043
}

Semantic roles & 50–950 ramp

primary

#183B86

secondary

#BA9340

accent

#B43BEC

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183B86

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

Preview Lab → · Contrast checker → · Palette generator →