#183A79#183A79

#183A79 is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.2% C 0.115 H 261.4°. Best body text is #FFFFFF at 10.94:1 contrast (WCAG AA passes).

Color values

HEX	#183A79
RGB	rgb(24, 58, 121)
HSL	hsl(219, 67%, 28%)
HSV	hsv(219, 80%, 47%)
CMYK	cmyk(80.2%, 52.1%, 0%, 52.5%)
CIE-LAB	lab(25.56, 12.34, -39.49)
CIE-LCH	lch(25.56, 41.38, 287.36°)
OKLab	oklab(36.24% -0.0172 -0.1136)
OKLCH	oklch(36.24% 0.115 261.4)
XYZ	xyz(5.3397, 4.6002, 18.6920)
Luminance	0.0460 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A79 #795718

analogous

#186A79 #183A79 #261879

triadic

#183A79 #79183A #3A7918

tetradic

#183A79 #79186A #795718 #187926

square

#183A79 #79186A #795718 #187926

split-complementary

#183A79 #792618 #6A7918

monochromatic

#050C1A #0E2246 #183A79 #2252AC #356DD7

Accessibility & contrast

On white

10.94

#183A79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#183A79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A79

10.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A79	#FFFFFF	#000000	##FFFFFF
##183A79	1.00	10.94	1.92	10.94
#FFFFFF	10.94	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#14417B

Deuteranopia (green-blind)

#003878

Tritanopia (blue-blind)

#004953

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #183a79;
/* rgb */ color: rgb(24, 58, 121);
/* oklch */ color: oklch(36.2% 0.115 261.4);

Tailwind

colors: {
  custom: {
    50: '#656fa0',
    500: '#183a79',
    950: '#000000',
  },
}

SCSS

$custom: #183a79;
$custom-light: #656fa0;
$custom-dark: #000000;

JSON

{
  "hex": "#183a79",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 121
  },
  "hsl": {
    "h": 218.969,
    "s": 66.897,
    "l": 28.431
  },
  "oklch": {
    "l": 0.36243,
    "c": 0.1149,
    "h": 261.4
  },
  "luminance": 0.04601
}

Semantic roles & 50–950 ramp

primary

#183A79

secondary

#AE873F

accent

#AE3EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070F

muted

#7A7A7E

Preview Lab

Preview with #183A79

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

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