#183C77#183C77

#183C77 is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.6% C 0.109 H 259.8°. Best body text is #FFFFFF at 10.76:1 contrast (WCAG AA passes).

Color values

HEX	#183C77
RGB	rgb(24, 60, 119)
HSL	hsl(217, 66%, 28%)
HSV	hsv(217, 80%, 47%)
CMYK	cmyk(79.8%, 49.6%, 0%, 53.3%)
CIE-LAB	lab(26.03, 10.10, -37.47)
CIE-LCH	lch(26.03, 38.81, 285.09°)
OKLab	oklab(36.56% -0.0193 -0.1076)
OKLCH	oklch(36.56% 0.109 259.8)
XYZ	xyz(5.3211, 4.7572, 18.0870)
Luminance	0.0476 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C77 #775318

analogous

#186B77 #183C77 #231877

triadic

#183C77 #77183C #3C7718

tetradic

#183C77 #77186B #775318 #187723

square

#183C77 #77186B #775318 #187723

split-complementary

#183C77 #772318 #6B7718

monochromatic

#050D19 #0E2244 #183C77 #2256AA #3371D6

Accessibility & contrast

On white

10.76

#183C77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#183C77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C77

10.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C77	#FFFFFF	#000000	##FFFFFF
##183C77	1.00	10.76	1.95	10.76
#FFFFFF	10.76	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B4279

Deuteranopia (green-blind)

#013A76

Tritanopia (blue-blind)

#004A53

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183c77;
/* rgb */ color: rgb(24, 60, 119);
/* oklch */ color: oklch(36.6% 0.109 259.8);

Tailwind

colors: {
  custom: {
    50: '#64719f',
    500: '#183c77',
    950: '#000000',
  },
}

SCSS

$custom: #183c77;
$custom-light: #64719f;
$custom-dark: #000000;

JSON

{
  "hex": "#183c77",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 119
  },
  "hsl": {
    "h": 217.263,
    "s": 66.434,
    "l": 28.039
  },
  "oklch": {
    "l": 0.36555,
    "c": 0.10932,
    "h": 259.8
  },
  "luminance": 0.04758
}

Semantic roles & 50–950 ramp

primary

#183C77

secondary

#AC833F

accent

#A93EE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183C77

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

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