#183E77#183E77

#183E77 is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.0% C 0.107 H 258.6°. Best body text is #FFFFFF at 10.53:1 contrast (WCAG AA passes).

Color values

HEX	#183E77
RGB	rgb(24, 62, 119)
HSL	hsl(216, 66%, 28%)
HSV	hsv(216, 80%, 47%)
CMYK	cmyk(79.8%, 47.9%, 0%, 53.3%)
CIE-LAB	lab(26.65, 8.70, -36.48)
CIE-LCH	lch(26.65, 37.50, 283.42°)
OKLab	oklab(37.03% -0.0211 -0.1046)
OKLCH	oklch(37.03% 0.107 258.6)
XYZ	xyz(5.4279, 4.9707, 18.1226)
Luminance	0.0497 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E77 #775118

analogous

#186D77 #183E77 #211877

triadic

#183E77 #77183E #3E7718

tetradic

#183E77 #77186D #775118 #187721

square

#183E77 #77186D #775118 #187721

split-complementary

#183E77 #772118 #6D7718

monochromatic

#050D19 #0E2344 #183E77 #2259AA #3374D6

Accessibility & contrast

On white

10.53

#183E77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#183E77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E77

10.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E77	#FFFFFF	#000000	##FFFFFF
##183E77	1.00	10.53	1.99	10.53
#FFFFFF	10.53	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#204479

Deuteranopia (green-blind)

#093B76

Tritanopia (blue-blind)

#004C54

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #183e77;
/* rgb */ color: rgb(24, 62, 119);
/* oklch */ color: oklch(37.0% 0.107 258.6);

Tailwind

colors: {
  custom: {
    50: '#64729f',
    500: '#183e77',
    950: '#000000',
  },
}

SCSS

$custom: #183e77;
$custom-light: #64729f;
$custom-dark: #000000;

JSON

{
  "hex": "#183e77",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 119
  },
  "hsl": {
    "h": 216,
    "s": 66.434,
    "l": 28.039
  },
  "oklch": {
    "l": 0.37032,
    "c": 0.10674,
    "h": 258.6
  },
  "luminance": 0.04971
}

Semantic roles & 50–950 ramp

primary

#183E77

secondary

#AC803F

accent

#A53EE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #183E77

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

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