#183A74#183A74

#183A74 is a dark, moderate blue. Relative luminance 0.045; OKLCH L 35.8% C 0.108 H 260.4°. Best body text is #FFFFFF at 11.07:1 contrast (WCAG AA passes).

Color values

HEX	#183A74
RGB	rgb(24, 58, 116)
HSL	hsl(218, 66%, 27%)
HSV	hsv(218, 79%, 45%)
CMYK	cmyk(79.3%, 50%, 0%, 54.5%)
CIE-LAB	lab(25.20, 10.27, -36.91)
CIE-LCH	lch(25.20, 38.31, 285.55°)
OKLab	oklab(35.85% -0.018 -0.106)
OKLCH	oklch(35.85% 0.108 260.4)
XYZ	xyz(5.0410, 4.4807, 17.1188)
Luminance	0.0448 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A74 #745218

analogous

#186874 #183A74 #241874

triadic

#183A74 #74183A #3A7418

tetradic

#183A74 #741868 #745218 #187424

square

#183A74 #741868 #745218 #187424

split-complementary

#183A74 #742418 #687418

monochromatic

#050D19 #0E2141 #183A74 #2253A7 #326ED5

Accessibility & contrast

On white

11.07

#183A74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#183A74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A74

11.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A74	#FFFFFF	#000000	##FFFFFF
##183A74	1.00	11.07	1.90	11.07
#FFFFFF	11.07	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A4076

Deuteranopia (green-blind)

#003873

Tritanopia (blue-blind)

#004851

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #183a74;
/* rgb */ color: rgb(24, 58, 116);
/* oklch */ color: oklch(35.8% 0.108 260.4);

Tailwind

colors: {
  custom: {
    50: '#646f9c',
    500: '#183a74',
    950: '#000000',
  },
}

SCSS

$custom: #183a74;
$custom-light: #646f9c;
$custom-dark: #000000;

JSON

{
  "hex": "#183a74",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 116
  },
  "hsl": {
    "h": 217.826,
    "s": 65.714,
    "l": 27.451
  },
  "oklch": {
    "l": 0.35849,
    "c": 0.10751,
    "h": 260.4
  },
  "luminance": 0.04481
}

Semantic roles & 50–950 ramp

primary

#183A74

secondary

#A9823F

accent

#AA3FE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183A74

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

Preview Lab → · Contrast checker → · Palette generator →