#183A72#183A72

#183A72 is a dark, moderate blue. Relative luminance 0.044; OKLCH L 35.7% C 0.105 H 259.9°. Best body text is #FFFFFF at 11.13:1 contrast (WCAG AA passes).

Color values

HEX	#183A72
RGB	rgb(24, 58, 114)
HSL	hsl(217, 65%, 27%)
HSV	hsv(217, 79%, 45%)
CMYK	cmyk(78.9%, 49.1%, 0%, 55.3%)
CIE-LAB	lab(25.06, 9.44, -35.86)
CIE-LCH	lch(25.06, 37.08, 284.74°)
OKLab	oklab(35.7% -0.0184 -0.1029)
OKLCH	oklch(35.7% 0.105 259.9)
XYZ	xyz(4.9259, 4.4347, 16.5127)
Luminance	0.0444 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A72 #725018

analogous

#186772 #183A72 #231872

triadic

#183A72 #72183A #3A7218

tetradic

#183A72 #721867 #725018 #187223

square

#183A72 #721867 #725018 #187223

split-complementary

#183A72 #722318 #677218

monochromatic

#050D19 #0D203F #183A72 #2354A5 #316ED4

Accessibility & contrast

On white

11.13

#183A72 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#183A72 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A72

11.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A72	#FFFFFF	#000000	##FFFFFF
##183A72	1.00	11.13	1.89	11.13
#FFFFFF	11.13	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C4074

Deuteranopia (green-blind)

#053871

Tritanopia (blue-blind)

#004750

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #183a72;
/* rgb */ color: rgb(24, 58, 114);
/* oklch */ color: oklch(35.7% 0.105 259.9);

Tailwind

colors: {
  custom: {
    50: '#636f9b',
    500: '#183a72',
    950: '#000000',
  },
}

SCSS

$custom: #183a72;
$custom-light: #636f9b;
$custom-dark: #000000;

JSON

{
  "hex": "#183a72",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 114
  },
  "hsl": {
    "h": 217.333,
    "s": 65.217,
    "l": 27.059
  },
  "oklch": {
    "l": 0.35695,
    "c": 0.10453,
    "h": 259.9
  },
  "luminance": 0.04435
}

Semantic roles & 50–950 ramp

primary

#183A72

secondary

#A7803E

accent

#A940E8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183A72

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

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