#183C79#183C79

#183C79 is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.7% C 0.112 H 260.3°. Best body text is #FFFFFF at 10.71:1 contrast (WCAG AA passes).

Color values

HEX	#183C79
RGB	rgb(24, 60, 121)
HSL	hsl(218, 67%, 28%)
HSV	hsv(218, 80%, 47%)
CMYK	cmyk(80.2%, 50.4%, 0%, 52.5%)
CIE-LAB	lab(26.17, 10.93, -38.51)
CIE-LCH	lch(26.17, 40.03, 285.85°)
OKLab	oklab(36.71% -0.0189 -0.1107)
OKLCH	oklch(36.71% 0.112 260.3)
XYZ	xyz(5.4425, 4.8058, 18.7262)
Luminance	0.0481 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C79 #795518

analogous

#186C79 #183C79 #241879

triadic

#183C79 #79183C #3C7918

tetradic

#183C79 #79186C #795518 #187924

square

#183C79 #79186C #795518 #187924

split-complementary

#183C79 #792418 #6C7918

monochromatic

#050D1A #0E2346 #183C79 #2255AC #3571D7

Accessibility & contrast

On white

10.71

#183C79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#183C79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C79

10.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C79	#FFFFFF	#000000	##FFFFFF
##183C79	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)

#19437B

Deuteranopia (green-blind)

#003A78

Tritanopia (blue-blind)

#004B54

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183c79;
/* rgb */ color: rgb(24, 60, 121);
/* oklch */ color: oklch(36.7% 0.112 260.3);

Tailwind

colors: {
  custom: {
    50: '#6571a0',
    500: '#183c79',
    950: '#000000',
  },
}

SCSS

$custom: #183c79;
$custom-light: #6571a0;
$custom-dark: #000000;

JSON

{
  "hex": "#183c79",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 121
  },
  "hsl": {
    "h": 217.732,
    "s": 66.897,
    "l": 28.431
  },
  "oklch": {
    "l": 0.3671,
    "c": 0.11227,
    "h": 260.3
  },
  "luminance": 0.04806
}

Semantic roles & 50–950 ramp

primary

#183C79

secondary

#AE853F

accent

#AA3EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070F

muted

#7A7A7E

Preview Lab

Preview with #183C79

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

Preview Lab → · Contrast checker → · Palette generator →