#183580#183580

#183580 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 35.7% C 0.132 H 264.5°. Best body text is #FFFFFF at 11.29:1 contrast (WCAG AA passes).

Color values

HEX	#183580
RGB	rgb(24, 53, 128)
HSL	hsl(223, 68%, 30%)
HSV	hsv(223, 81%, 50%)
CMYK	cmyk(81.3%, 58.6%, 0%, 49.8%)
CIE-LAB	lab(24.63, 18.77, -45.41)
CIE-LCH	lch(24.63, 49.14, 292.46°)
OKLab	oklab(35.71% -0.0125 -0.1311)
OKLCH	oklch(35.71% 0.132 264.5)
XYZ	xyz(5.5447, 4.2983, 20.9553)
Luminance	0.0430 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183580 #806318

analogous

#186980 #183580 #2F1880

triadic

#183580 #801835 #358018

tetradic

#183580 #801869 #806318 #18802F

square

#183580 #801869 #806318 #18802F

split-complementary

#183580 #802F18 #698018

monochromatic

#050B1A #0E204C #183580 #224AB4 #3966DA

Accessibility & contrast

On white

11.29

#183580 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#183580 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183580

11.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183580	#FFFFFF	#000000	##FFFFFF
##183580	1.00	11.29	1.86	11.29
#FFFFFF	11.29	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F83

Deuteranopia (green-blind)

#00367F

Tritanopia (blue-blind)

#004855

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183580;
/* rgb */ color: rgb(24, 53, 128);
/* oklch */ color: oklch(35.7% 0.132 264.5);

Tailwind

colors: {
  custom: {
    50: '#676ba5',
    500: '#183580',
    950: '#000000',
  },
}

SCSS

$custom: #183580;
$custom-light: #676ba5;
$custom-dark: #000000;

JSON

{
  "hex": "#183580",
  "rgb": {
    "r": 24,
    "g": 53,
    "b": 128
  },
  "hsl": {
    "h": 223.269,
    "s": 68.421,
    "l": 29.804
  },
  "oklch": {
    "l": 0.35711,
    "c": 0.13171,
    "h": 264.5
  },
  "luminance": 0.04299
}

Semantic roles & 50–950 ramp

primary

#183580

secondary

#B49440

accent

#BB3DEB

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #183580

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

Preview Lab → · Contrast checker → · Palette generator →