#183A7C#183A7C

#183A7C is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.5% C 0.119 H 261.9°. Best body text is #FFFFFF at 10.85:1 contrast (WCAG AA passes).

Color values

HEX	#183A7C
RGB	rgb(24, 58, 124)
HSL	hsl(220, 68%, 29%)
HSV	hsv(220, 81%, 49%)
CMYK	cmyk(80.6%, 53.2%, 0%, 51.4%)
CIE-LAB	lab(25.79, 13.59, -41.02)
CIE-LCH	lch(25.79, 43.22, 288.32°)
OKLab	oklab(36.49% -0.0168 -0.1181)
OKLCH	oklch(36.49% 0.119 261.9)
XYZ	xyz(5.5265, 4.6749, 19.6760)
Luminance	0.0468 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A7C #7C5A18

analogous

#186C7C #183A7C #28187C

triadic

#183A7C #7C183A #3A7C18

tetradic

#183A7C #7C186C #7C5A18 #187C28

square

#183A7C #7C186C #7C5A18 #187C28

split-complementary

#183A7C #7C2818 #6C7C18

monochromatic

#050C1A #0E2249 #183A7C #2252AF #366DD8

Accessibility & contrast

On white

10.85

#183A7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#183A7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A7C

10.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A7C	#FFFFFF	#000000	##FFFFFF
##183A7C	1.00	10.85	1.94	10.85
#FFFFFF	10.85	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F427E

Deuteranopia (green-blind)

#00397B

Tritanopia (blue-blind)

#004A55

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #183a7c;
/* rgb */ color: rgb(24, 58, 124);
/* oklch */ color: oklch(36.5% 0.119 261.9);

Tailwind

colors: {
  custom: {
    50: '#666fa2',
    500: '#183a7c',
    950: '#000000',
  },
}

SCSS

$custom: #183a7c;
$custom-light: #666fa2;
$custom-dark: #000000;

JSON

{
  "hex": "#183a7c",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 124
  },
  "hsl": {
    "h": 219.6,
    "s": 67.568,
    "l": 29.02
  },
  "oklch": {
    "l": 0.36485,
    "c": 0.11929,
    "h": 261.9
  },
  "luminance": 0.04676
}

Semantic roles & 50–950 ramp

primary

#183A7C

secondary

#B18A3F

accent

#B03DEA

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #183A7C

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

Preview Lab → · Contrast checker → · Palette generator →