#183A76#183A76

#183A76 is a dark, moderate blue. Relative luminance 0.045; OKLCH L 36.0% C 0.110 H 260.8°. Best body text is #FFFFFF at 11.02:1 contrast (WCAG AA passes).

Color values

HEX	#183A76
RGB	rgb(24, 58, 118)
HSL	hsl(218, 66%, 28%)
HSV	hsv(218, 80%, 46%)
CMYK	cmyk(79.7%, 50.8%, 0%, 53.7%)
CIE-LAB	lab(25.34, 11.10, -37.95)
CIE-LCH	lch(25.34, 39.54, 286.30°)
OKLab	oklab(36% -0.0177 -0.109)
OKLCH	oklch(36% 0.11 260.8)
XYZ	xyz(5.1586, 4.5277, 17.7381)
Luminance	0.0453 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A76 #765418

analogous

#186976 #183A76 #251876

triadic

#183A76 #76183A #3A7618

tetradic

#183A76 #761869 #765418 #187625

square

#183A76 #761869 #765418 #187625

split-complementary

#183A76 #762518 #697618

monochromatic

#050C19 #0E2143 #183A76 #2253A9 #336ED5

Accessibility & contrast

On white

11.02

#183A76 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#183A76 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A76

11.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A76	#FFFFFF	#000000	##FFFFFF
##183A76	1.00	11.02	1.91	11.02
#FFFFFF	11.02	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	11.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#174178

Deuteranopia (green-blind)

#003875

Tritanopia (blue-blind)

#004852

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #183a76;
/* rgb */ color: rgb(24, 58, 118);
/* oklch */ color: oklch(36.0% 0.110 260.8);

Tailwind

colors: {
  custom: {
    50: '#646f9e',
    500: '#183a76',
    950: '#000000',
  },
}

SCSS

$custom: #183a76;
$custom-light: #646f9e;
$custom-dark: #000000;

JSON

{
  "hex": "#183a76",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 118
  },
  "hsl": {
    "h": 218.298,
    "s": 66.197,
    "l": 27.843
  },
  "oklch": {
    "l": 0.36005,
    "c": 0.11047,
    "h": 260.8
  },
  "luminance": 0.04528
}

Semantic roles & 50–950 ramp

primary

#183A76

secondary

#AB843F

accent

#AB3FE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183A76

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

Preview Lab → · Contrast checker → · Palette generator →