#183681#183681

#183681 is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.0% C 0.132 H 264.3°. Best body text is #FFFFFF at 11.15:1 contrast (WCAG AA passes).

Color values

HEX	#183681
RGB	rgb(24, 54, 129)
HSL	hsl(223, 69%, 30%)
HSV	hsv(223, 81%, 51%)
CMYK	cmyk(81.4%, 58.1%, 0%, 49.4%)
CIE-LAB	lab(25.00, 18.47, -45.44)
CIE-LCH	lch(25.00, 49.05, 292.13°)
OKLab	oklab(36.02% -0.0132 -0.1312)
OKLCH	oklch(36.02% 0.132 264.3)
XYZ	xyz(5.6569, 4.4168, 21.3190)
Luminance	0.0442 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183681 #816318

analogous

#186B81 #183681 #2E1881

triadic

#183681 #811836 #368118

tetradic

#183681 #81186B #816318 #18812E

square

#183681 #81186B #816318 #18812E

split-complementary

#183681 #812E18 #6B8118

monochromatic

#050B1A #0E204D #183681 #224CB5 #3967DA

Accessibility & contrast

On white

11.15

#183681 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#183681 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183681

11.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183681	#FFFFFF	#000000	##FFFFFF
##183681	1.00	11.15	1.88	11.15
#FFFFFF	11.15	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004084

Deuteranopia (green-blind)

#003780

Tritanopia (blue-blind)

#004956

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #183681;
/* rgb */ color: rgb(24, 54, 129);
/* oklch */ color: oklch(36.0% 0.132 264.3);

Tailwind

colors: {
  custom: {
    50: '#676ca6',
    500: '#183681',
    950: '#000000',
  },
}

SCSS

$custom: #183681;
$custom-light: #676ca6;
$custom-dark: #000000;

JSON

{
  "hex": "#183681",
  "rgb": {
    "r": 24,
    "g": 54,
    "b": 129
  },
  "hsl": {
    "h": 222.857,
    "s": 68.627,
    "l": 30
  },
  "oklch": {
    "l": 0.36016,
    "c": 0.13182,
    "h": 264.3
  },
  "luminance": 0.04418
}

Semantic roles & 50–950 ramp

primary

#183681

secondary

#B59440

accent

#B93CEB

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #183681

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

Preview Lab → · Contrast checker → · Palette generator →