#183A7D#183A7D

#183A7D is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.6% C 0.121 H 262.1°. Best body text is #FFFFFF at 10.82:1 contrast (WCAG AA passes).

Color values

HEX	#183A7D
RGB	rgb(24, 58, 125)
HSL	hsl(220, 68%, 29%)
HSV	hsv(220, 81%, 49%)
CMYK	cmyk(80.8%, 53.6%, 0%, 51%)
CIE-LAB	lab(25.86, 14.00, -41.53)
CIE-LCH	lch(25.86, 43.83, 288.63°)
OKLab	oklab(36.57% -0.0167 -0.1196)
OKLCH	oklch(36.57% 0.121 262.1)
XYZ	xyz(5.5901, 4.7003, 20.0107)
Luminance	0.0470 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A7D #7D5B18

analogous

#186D7D #183A7D #29187D

triadic

#183A7D #7D183A #3A7D18

tetradic

#183A7D #7D186D #7D5B18 #187D29

square

#183A7D #7D186D #7D5B18 #187D29

split-complementary

#183A7D #7D2918 #6D7D18

monochromatic

#050C1A #0E224A #183A7D #2252B0 #376DD9

Accessibility & contrast

On white

10.82

#183A7D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#183A7D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A7D

10.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A7D	#FFFFFF	#000000	##FFFFFF
##183A7D	1.00	10.82	1.94	10.82
#FFFFFF	10.82	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D427F

Deuteranopia (green-blind)

#00397C

Tritanopia (blue-blind)

#004A55

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #183a7d;
/* rgb */ color: rgb(24, 58, 125);
/* oklch */ color: oklch(36.6% 0.121 262.1);

Tailwind

colors: {
  custom: {
    50: '#666fa3',
    500: '#183a7d',
    950: '#000000',
  },
}

SCSS

$custom: #183a7d;
$custom-light: #666fa3;
$custom-dark: #000000;

JSON

{
  "hex": "#183a7d",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 125
  },
  "hsl": {
    "h": 219.802,
    "s": 67.785,
    "l": 29.216
  },
  "oklch": {
    "l": 0.36567,
    "c": 0.12075,
    "h": 262.1
  },
  "luminance": 0.04701
}

Semantic roles & 50–950 ramp

primary

#183A7D

secondary

#B28B3F

accent

#B03DEB

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #183A7D

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

Preview Lab → · Contrast checker → · Palette generator →