#183A77#183A77

#183A77 is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.1% C 0.112 H 261.0°. Best body text is #FFFFFF at 10.99:1 contrast (WCAG AA passes).

Color values

HEX	#183A77
RGB	rgb(24, 58, 119)
HSL	hsl(219, 66%, 28%)
HSV	hsv(219, 80%, 47%)
CMYK	cmyk(79.8%, 51.3%, 0%, 53.3%)
CIE-LAB	lab(25.42, 11.51, -38.46)
CIE-LCH	lch(25.42, 40.15, 286.66°)
OKLab	oklab(36.08% -0.0175 -0.1106)
OKLCH	oklch(36.08% 0.112 261)
XYZ	xyz(5.2183, 4.5516, 18.0527)
Luminance	0.0455 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A77 #775518

analogous

#186977 #183A77 #251877

triadic

#183A77 #77183A #3A7718

tetradic

#183A77 #771869 #775518 #187725

square

#183A77 #771869 #775518 #187725

split-complementary

#183A77 #772518 #697718

monochromatic

#050C19 #0E2144 #183A77 #2253AA #336ED6

Accessibility & contrast

On white

10.99

#183A77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#183A77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A77

10.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A77	#FFFFFF	#000000	##FFFFFF
##183A77	1.00	10.99	1.91	10.99
#FFFFFF	10.99	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	10.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#164179

Deuteranopia (green-blind)

#003876

Tritanopia (blue-blind)

#004952

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #183a77;
/* rgb */ color: rgb(24, 58, 119);
/* oklch */ color: oklch(36.1% 0.112 261.0);

Tailwind

colors: {
  custom: {
    50: '#656f9f',
    500: '#183a77',
    950: '#000000',
  },
}

SCSS

$custom: #183a77;
$custom-light: #656f9f;
$custom-dark: #000000;

JSON

{
  "hex": "#183a77",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 119
  },
  "hsl": {
    "h": 218.526,
    "s": 66.434,
    "l": 28.039
  },
  "oklch": {
    "l": 0.36084,
    "c": 0.11195,
    "h": 261
  },
  "luminance": 0.04552
}

Semantic roles & 50–950 ramp

primary

#183A77

secondary

#AC853F

accent

#AC3EE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183A77

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

Preview Lab → · Contrast checker → · Palette generator →