#183978#183978

#183978 is a dark, moderate blue. Relative luminance 0.045; OKLCH L 35.9% C 0.115 H 261.7°. Best body text is #FFFFFF at 11.08:1 contrast (WCAG AA passes).

Color values

HEX	#183978
RGB	rgb(24, 57, 120)
HSL	hsl(219, 67%, 28%)
HSV	hsv(219, 80%, 47%)
CMYK	cmyk(80%, 52.5%, 0%, 52.9%)
CIE-LAB	lab(25.19, 12.64, -39.47)
CIE-LCH	lch(25.19, 41.44, 287.75°)
OKLab	oklab(35.93% -0.0165 -0.1135)
OKLCH	oklch(35.93% 0.115 261.7)
XYZ	xyz(5.2288, 4.4759, 18.3540)
Luminance	0.0448 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183978 #785718

analogous

#186978 #183978 #271878

triadic

#183978 #781839 #397818

tetradic

#183978 #781869 #785718 #187827

square

#183978 #781869 #785718 #187827

split-complementary

#183978 #782718 #697818

monochromatic

#050C1A #0E2145 #183978 #2251AB #346CD6

Accessibility & contrast

On white

11.08

#183978 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#183978 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183978

11.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183978	#FFFFFF	#000000	##FFFFFF
##183978	1.00	11.08	1.90	11.08
#FFFFFF	11.08	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#12407A

Deuteranopia (green-blind)

#003877

Tritanopia (blue-blind)

#004852

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #183978;
/* rgb */ color: rgb(24, 57, 120);
/* oklch */ color: oklch(35.9% 0.115 261.7);

Tailwind

colors: {
  custom: {
    50: '#656e9f',
    500: '#183978',
    950: '#000000',
  },
}

SCSS

$custom: #183978;
$custom-light: #656e9f;
$custom-dark: #000000;

JSON

{
  "hex": "#183978",
  "rgb": {
    "r": 24,
    "g": 57,
    "b": 120
  },
  "hsl": {
    "h": 219.375,
    "s": 66.667,
    "l": 28.235
  },
  "oklch": {
    "l": 0.35931,
    "c": 0.11474,
    "h": 261.7
  },
  "luminance": 0.04477
}

Semantic roles & 50–950 ramp

primary

#183978

secondary

#AD873F

accent

#AF3EEA

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183978

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

Preview Lab → · Contrast checker → · Palette generator →