#183D77#183D77

#183D77 is a dark, moderate blue. Relative luminance 0.049; OKLCH L 36.8% C 0.108 H 259.2°. Best body text is #FFFFFF at 10.64:1 contrast (WCAG AA passes).

Color values

HEX	#183D77
RGB	rgb(24, 61, 119)
HSL	hsl(217, 66%, 28%)
HSV	hsv(217, 80%, 47%)
CMYK	cmyk(79.8%, 48.7%, 0%, 53.3%)
CIE-LAB	lab(26.34, 9.40, -36.98)
CIE-LCH	lch(26.34, 38.15, 284.27°)
OKLab	oklab(36.79% -0.0202 -0.1061)
OKLCH	oklch(36.79% 0.108 259.2)
XYZ	xyz(5.3740, 4.8630, 18.1046)
Luminance	0.0486 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D77 #775218

analogous

#186C77 #183D77 #231877

triadic

#183D77 #77183D #3D7718

tetradic

#183D77 #77186C #775218 #187723

square

#183D77 #77186C #775218 #187723

split-complementary

#183D77 #772318 #6C7718

monochromatic

#050D19 #0E2344 #183D77 #2257AA #3373D6

Accessibility & contrast

On white

10.64

#183D77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#183D77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D77

10.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D77	#FFFFFF	#000000	##FFFFFF
##183D77	1.00	10.64	1.97	10.64
#FFFFFF	10.64	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E4379

Deuteranopia (green-blind)

#053A76

Tritanopia (blue-blind)

#004B54

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183d77;
/* rgb */ color: rgb(24, 61, 119);
/* oklch */ color: oklch(36.8% 0.108 259.2);

Tailwind

colors: {
  custom: {
    50: '#64729f',
    500: '#183d77',
    950: '#000000',
  },
}

SCSS

$custom: #183d77;
$custom-light: #64729f;
$custom-dark: #000000;

JSON

{
  "hex": "#183d77",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 119
  },
  "hsl": {
    "h": 216.632,
    "s": 66.434,
    "l": 28.039
  },
  "oklch": {
    "l": 0.36793,
    "c": 0.10803,
    "h": 259.2
  },
  "luminance": 0.04864
}

Semantic roles & 50–950 ramp

primary

#183D77

secondary

#AC813F

accent

#A73EE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183D77

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

Preview Lab → · Contrast checker → · Palette generator →