#183778#183778

#183778 is a dark, moderate blue. Relative luminance 0.043; OKLCH L 35.5% C 0.117 H 262.7°. Best body text is #FFFFFF at 11.31:1 contrast (WCAG AA passes).

Color values

HEX	#183778
RGB	rgb(24, 55, 120)
HSL	hsl(221, 67%, 28%)
HSV	hsv(221, 80%, 47%)
CMYK	cmyk(80%, 54.2%, 0%, 52.9%)
CIE-LAB	lab(24.58, 14.05, -40.45)
CIE-LCH	lch(24.58, 42.82, 289.16°)
OKLab	oklab(35.47% -0.0148 -0.1165)
OKLCH	oklch(35.47% 0.117 262.7)
XYZ	xyz(5.1318, 4.2820, 18.3217)
Luminance	0.0428 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183778 #785918

analogous

#186778 #183778 #291878

triadic

#183778 #781837 #377818

tetradic

#183778 #781867 #785918 #187829

square

#183778 #781867 #785918 #187829

split-complementary

#183778 #782918 #677818

monochromatic

#050C1A #0E2045 #183778 #224EAB #3468D6

Accessibility & contrast

On white

11.31

#183778 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#183778 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183778

11.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183778	#FFFFFF	#000000	##FFFFFF
##183778	1.00	11.31	1.86	11.31
#FFFFFF	11.31	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A3F7A

Deuteranopia (green-blind)

#003677

Tritanopia (blue-blind)

#004752

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183778;
/* rgb */ color: rgb(24, 55, 120);
/* oklch */ color: oklch(35.5% 0.117 262.7);

Tailwind

colors: {
  custom: {
    50: '#656d9f',
    500: '#183778',
    950: '#000000',
  },
}

SCSS

$custom: #183778;
$custom-light: #656d9f;
$custom-dark: #000000;

JSON

{
  "hex": "#183778",
  "rgb": {
    "r": 24,
    "g": 55,
    "b": 120
  },
  "hsl": {
    "h": 220.625,
    "s": 66.667,
    "l": 28.235
  },
  "oklch": {
    "l": 0.35471,
    "c": 0.1174,
    "h": 262.7
  },
  "luminance": 0.04283
}

Semantic roles & 50–950 ramp

primary

#183778

secondary

#AD893F

accent

#B23EEA

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06070F

muted

#7A7A7E

Preview Lab

Preview with #183778

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

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