#183C8C#183C8C

#183C8C is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.3% C 0.140 H 263.1°. Best body text is #FFFFFF at 10.18:1 contrast (WCAG AA passes).

Color values

HEX	#183C8C
RGB	rgb(24, 60, 140)
HSL	hsl(221, 71%, 32%)
HSV	hsv(221, 83%, 55%)
CMYK	cmyk(82.9%, 57.1%, 0%, 45.1%)
CIE-LAB	lab(27.62, 18.76, -48.03)
CIE-LCH	lch(27.62, 51.57, 291.34°)
OKLab	oklab(38.27% -0.0167 -0.1387)
OKLCH	oklch(38.27% 0.14 263.1)
XYZ	xyz(6.7245, 5.3186, 25.4780)
Luminance	0.0532 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C8C #8C6818

analogous

#18768C #183C8C #2E188C

triadic

#183C8C #8C183C #3C8C18

tetradic

#183C8C #8C1876 #8C6818 #188C2E

square

#183C8C #8C1876 #8C6818 #188C2E

split-complementary

#183C8C #8C2E18 #768C18

monochromatic

#060F24 #0F2658 #183C8C #2152C0 #4071DE

Accessibility & contrast

On white

10.18

#183C8C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#183C8C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C8C

10.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C8C	#FFFFFF	#000000	##FFFFFF
##183C8C	1.00	10.18	2.06	10.18
#FFFFFF	10.18	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478F

Deuteranopia (green-blind)

#003C8A

Tritanopia (blue-blind)

#00505E

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #183c8c;
/* rgb */ color: rgb(24, 60, 140);
/* oklch */ color: oklch(38.3% 0.140 263.1);

Tailwind

colors: {
  custom: {
    50: '#6a71ae',
    500: '#183c8c',
    950: '#000000',
  },
}

SCSS

$custom: #183c8c;
$custom-light: #6a71ae;
$custom-dark: #000000;

JSON

{
  "hex": "#183c8c",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 140
  },
  "hsl": {
    "h": 221.379,
    "s": 70.732,
    "l": 32.157
  },
  "oklch": {
    "l": 0.38273,
    "c": 0.13967,
    "h": 263.1
  },
  "luminance": 0.05319
}

Semantic roles & 50–950 ramp

primary

#183C8C

secondary

#BF9841

accent

#B63AED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #183C8C

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

Preview Lab → · Contrast checker → · Palette generator →