#183688#183688

#183688 is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.6% C 0.142 H 264.8°. Best body text is #FFFFFF at 10.93:1 contrast (WCAG AA passes).

Color values

HEX	#183688
RGB	rgb(24, 54, 136)
HSL	hsl(224, 70%, 31%)
HSV	hsv(224, 82%, 53%)
CMYK	cmyk(82.4%, 60.3%, 0%, 46.7%)
CIE-LAB	lab(25.59, 21.33, -48.86)
CIE-LCH	lch(25.59, 53.31, 293.58°)
OKLab	oklab(36.64% -0.0128 -0.1412)
OKLCH	oklch(36.64% 0.142 264.8)
XYZ	xyz(6.1382, 4.6094, 23.8540)
Luminance	0.0461 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183688 #886A18

analogous

#186E88 #183688 #321888

triadic

#183688 #881836 #368818

tetradic

#183688 #88186E #886A18 #188832

square

#183688 #88186E #886A18 #188832

split-complementary

#183688 #883218 #6E8818

monochromatic

#060D20 #0F2154 #183688 #214BBC #3E68DD

Accessibility & contrast

On white

10.93

#183688 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#183688 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183688

10.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183688	#FFFFFF	#000000	##FFFFFF
##183688	1.00	10.93	1.92	10.93
#FFFFFF	10.93	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00428B

Deuteranopia (green-blind)

#003886

Tritanopia (blue-blind)

#004B59

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #183688;
/* rgb */ color: rgb(24, 54, 136);
/* oklch */ color: oklch(36.6% 0.142 264.8);

Tailwind

colors: {
  custom: {
    50: '#696cab',
    500: '#183688',
    950: '#000000',
  },
}

SCSS

$custom: #183688;
$custom-light: #696cab;
$custom-dark: #000000;

JSON

{
  "hex": "#183688",
  "rgb": {
    "r": 24,
    "g": 54,
    "b": 136
  },
  "hsl": {
    "h": 223.929,
    "s": 70,
    "l": 31.373
  },
  "oklch": {
    "l": 0.36641,
    "c": 0.14178,
    "h": 264.8
  },
  "luminance": 0.0461
}

Semantic roles & 50–950 ramp

primary

#183688

secondary

#BC9B40

accent

#BD3BED

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183688

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

Preview Lab → · Contrast checker → · Palette generator →