#183181#183181

#183181 is a dark, vivid blue. Relative luminance 0.040; OKLCH L 35.0% C 0.138 H 266.0°. Best body text is #FFFFFF at 11.70:1 contrast (WCAG AA passes).

Color values

HEX	#183181
RGB	rgb(24, 49, 129)
HSL	hsl(226, 69%, 30%)
HSV	hsv(226, 81%, 51%)
CMYK	cmyk(81.4%, 62%, 0%, 49.4%)
CIE-LAB	lab(23.59, 22.00, -47.74)
CIE-LCH	lch(23.59, 52.57, 294.74°)
OKLab	oklab(34.96% -0.0097 -0.138)
OKLCH	oklch(34.96% 0.138 266)
XYZ	xyz(5.4361, 3.9752, 21.2454)
Luminance	0.0398 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183181 #816818

analogous

#186681 #183181 #331881

triadic

#183181 #811831 #318118

tetradic

#183181 #811866 #816818 #188133

square

#183181 #811866 #816818 #188133

split-complementary

#183181 #813318 #668118

monochromatic

#050A1A #0E1D4D #183181 #2245B5 #3960DA

Accessibility & contrast

On white

11.70

#183181 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#183181 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183181

11.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183181	#FFFFFF	#000000	##FFFFFF
##183181	1.00	11.70	1.80	11.70
#FFFFFF	11.70	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D84

Deuteranopia (green-blind)

#00337F

Tritanopia (blue-blind)

#004554

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #183181;
/* rgb */ color: rgb(24, 49, 129);
/* oklch */ color: oklch(35.0% 0.138 266.0);

Tailwind

colors: {
  custom: {
    50: '#6868a6',
    500: '#183181',
    950: '#000000',
  },
}

SCSS

$custom: #183181;
$custom-light: #6868a6;
$custom-dark: #000000;

JSON

{
  "hex": "#183181",
  "rgb": {
    "r": 24,
    "g": 49,
    "b": 129
  },
  "hsl": {
    "h": 225.714,
    "s": 68.627,
    "l": 30
  },
  "oklch": {
    "l": 0.34955,
    "c": 0.13836,
    "h": 266
  },
  "luminance": 0.03976
}

Semantic roles & 50–950 ramp

primary

#183181

secondary

#B59940

accent

#C23CEB

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #183181

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

Preview Lab → · Contrast checker → · Palette generator →