#183888#183888

#183888 is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.1% C 0.139 H 264.2°. Best body text is #FFFFFF at 10.71:1 contrast (WCAG AA passes).

Color values

HEX	#183888
RGB	rgb(24, 56, 136)
HSL	hsl(223, 70%, 31%)
HSV	hsv(223, 82%, 53%)
CMYK	cmyk(82.4%, 58.8%, 0%, 46.7%)
CIE-LAB	lab(26.16, 19.93, -47.94)
CIE-LCH	lch(26.16, 51.92, 292.57°)
OKLab	oklab(37.06% -0.0142 -0.1385)
OKLCH	oklch(37.06% 0.139 264.2)
XYZ	xyz(6.2332, 4.7994, 23.8856)
Luminance	0.0480 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183888 #886818

analogous

#187088 #183888 #301888

triadic

#183888 #881838 #388818

tetradic

#183888 #881870 #886818 #188830

square

#183888 #881870 #886818 #188830

split-complementary

#183888 #883018 #708818

monochromatic

#060D20 #0F2354 #183888 #214DBC #3E6BDD

Accessibility & contrast

On white

10.71

#183888 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#183888 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183888

10.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183888	#FFFFFF	#000000	##FFFFFF
##183888	1.00	10.71	1.96	10.71
#FFFFFF	10.71	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00438B

Deuteranopia (green-blind)

#003986

Tritanopia (blue-blind)

#004C5A

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183888;
/* rgb */ color: rgb(24, 56, 136);
/* oklch */ color: oklch(37.1% 0.139 264.2);

Tailwind

colors: {
  custom: {
    50: '#696eab',
    500: '#183888',
    950: '#000000',
  },
}

SCSS

$custom: #183888;
$custom-light: #696eab;
$custom-dark: #000000;

JSON

{
  "hex": "#183888",
  "rgb": {
    "r": 24,
    "g": 56,
    "b": 136
  },
  "hsl": {
    "h": 222.857,
    "s": 70,
    "l": 31.373
  },
  "oklch": {
    "l": 0.37064,
    "c": 0.13919,
    "h": 264.2
  },
  "luminance": 0.048
}

Semantic roles & 50–950 ramp

primary

#183888

secondary

#BC9840

accent

#BA3BED

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183888

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

Preview Lab → · Contrast checker → · Palette generator →