#183C71#183C71

#183C71 is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.1% C 0.100 H 258.3°. Best body text is #FFFFFF at 10.92:1 contrast (WCAG AA passes).

Color values

HEX	#183C71
RGB	rgb(24, 60, 113)
HSL	hsl(216, 65%, 27%)
HSV	hsv(216, 79%, 44%)
CMYK	cmyk(78.8%, 46.9%, 0%, 55.7%)
CIE-LAB	lab(25.62, 7.62, -34.33)
CIE-LCH	lch(25.62, 35.17, 282.51°)
OKLab	oklab(36.1% -0.0204 -0.0984)
OKLCH	oklch(36.1% 0.1 258.3)
XYZ	xyz(4.9721, 4.6176, 16.2488)
Luminance	0.0462 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C71 #714D18

analogous

#186971 #183C71 #201871

triadic

#183C71 #71183C #3C7118

tetradic

#183C71 #711869 #714D18 #187120

square

#183C71 #711869 #714D18 #187120

split-complementary

#183C71 #712018 #697118

monochromatic

#050D19 #0D213F #183C71 #2357A3 #3072D3

Accessibility & contrast

On white

10.92

#183C71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#183C71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C71

10.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C71	#FFFFFF	#000000	##FFFFFF
##183C71	1.00	10.92	1.92	10.92
#FFFFFF	10.92	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#214173

Deuteranopia (green-blind)

#0F3970

Tritanopia (blue-blind)

#004951

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #183c71;
/* rgb */ color: rgb(24, 60, 113);
/* oklch */ color: oklch(36.1% 0.100 258.3);

Tailwind

colors: {
  custom: {
    50: '#63719a',
    500: '#183c71',
    950: '#000000',
  },
}

SCSS

$custom: #183c71;
$custom-light: #63719a;
$custom-dark: #000000;

JSON

{
  "hex": "#183c71",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 113
  },
  "hsl": {
    "h": 215.73,
    "s": 64.964,
    "l": 26.863
  },
  "oklch": {
    "l": 0.36102,
    "c": 0.10047,
    "h": 258.3
  },
  "luminance": 0.04618
}

Semantic roles & 50–950 ramp

primary

#183C71

secondary

#A67C3E

accent

#A440E8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183C71

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

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