#183B8E#183B8E

#183B8E is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.2% C 0.144 H 263.7°. Best body text is #FFFFFF at 10.22:1 contrast (WCAG AA passes).

Color values

HEX	#183B8E
RGB	rgb(24, 59, 142)
HSL	hsl(222, 71%, 33%)
HSV	hsv(222, 83%, 56%)
CMYK	cmyk(83.1%, 58.5%, 0%, 44.3%)
CIE-LAB	lab(27.50, 20.28, -49.46)
CIE-LCH	lch(27.50, 53.46, 292.29°)
OKLab	oklab(38.23% -0.0158 -0.1429)
OKLCH	oklch(38.23% 0.144 263.7)
XYZ	xyz(6.8214, 5.2743, 26.2445)
Luminance	0.0527 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B8E #8E6B18

analogous

#18768E #183B8E #30188E

triadic

#183B8E #8E183B #3B8E18

tetradic

#183B8E #8E1876 #8E6B18 #188E30

square

#183B8E #8E1876 #8E6B18 #188E30

split-complementary

#183B8E #8E3018 #768E18

monochromatic

#060F25 #0F255A #183B8E #2151C2 #4170DF

Accessibility & contrast

On white

10.22

#183B8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#183B8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B8E

10.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B8E	#FFFFFF	#000000	##FFFFFF
##183B8E	1.00	10.22	2.06	10.22
#FFFFFF	10.22	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004791

Deuteranopia (green-blind)

#003C8C

Tritanopia (blue-blind)

#00505E

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #183b8e;
/* rgb */ color: rgb(24, 59, 142);
/* oklch */ color: oklch(38.2% 0.144 263.7);

Tailwind

colors: {
  custom: {
    50: '#6b70b0',
    500: '#183b8e',
    950: '#000000',
  },
}

SCSS

$custom: #183b8e;
$custom-light: #6b70b0;
$custom-dark: #000000;

JSON

{
  "hex": "#183b8e",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 142
  },
  "hsl": {
    "h": 222.203,
    "s": 71.084,
    "l": 32.549
  },
  "oklch": {
    "l": 0.38233,
    "c": 0.14378,
    "h": 263.7
  },
  "luminance": 0.05275
}

Semantic roles & 50–950 ramp

primary

#183B8E

secondary

#C09A42

accent

#B83AEE

background

#F6F6FA

surface

#ECECF5

border

#C7C7CF

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #183B8E

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

Preview Lab → · Contrast checker → · Palette generator →