#183F86#183F86

#183F86 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.4% C 0.127 H 261.2°. Best body text is #FFFFFF at 10.03:1 contrast (WCAG AA passes).

Color values

HEX	#183F86
RGB	rgb(24, 63, 134)
HSL	hsl(219, 70%, 31%)
HSV	hsv(219, 82%, 53%)
CMYK	cmyk(82.1%, 53%, 0%, 47.5%)
CIE-LAB	lab(28.03, 14.21, -43.65)
CIE-LCH	lch(28.03, 45.90, 288.03°)
OKLab	oklab(38.44% -0.0195 -0.1257)
OKLCH	oklch(38.44% 0.127 261.2)
XYZ	xyz(6.4557, 5.4697, 23.2651)
Luminance	0.0547 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F86 #865F18

analogous

#187686 #183F86 #281886

triadic

#183F86 #86183F #3F8618

tetradic

#183F86 #861876 #865F18 #188628

square

#183F86 #861876 #865F18 #188628

split-complementary

#183F86 #862818 #768618

monochromatic

#050E1E #0F2752 #183F86 #2157BA #3C75DC

Accessibility & contrast

On white

10.03

#183F86 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#183F86 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F86

10.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F86	#FFFFFF	#000000	##FFFFFF
##183F86	1.00	10.03	2.09	10.03
#FFFFFF	10.03	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F4789

Deuteranopia (green-blind)

#003D85

Tritanopia (blue-blind)

#00505C

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #183f86;
/* rgb */ color: rgb(24, 63, 134);
/* oklch */ color: oklch(38.4% 0.127 261.2);

Tailwind

colors: {
  custom: {
    50: '#6873aa',
    500: '#183f86',
    950: '#000000',
  },
}

SCSS

$custom: #183f86;
$custom-light: #6873aa;
$custom-dark: #000000;

JSON

{
  "hex": "#183f86",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 134
  },
  "hsl": {
    "h": 218.727,
    "s": 69.62,
    "l": 30.98
  },
  "oklch": {
    "l": 0.38436,
    "c": 0.12723,
    "h": 261.2
  },
  "luminance": 0.0547
}

Semantic roles & 50–950 ramp

primary

#183F86

secondary

#BA8F40

accent

#AE3BEC

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #183F86

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

Preview Lab → · Contrast checker → · Palette generator →