#243D8D#243D8D

#243D8D is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.1% C 0.136 H 266.8°. Best body text is #FFFFFF at 9.87:1 contrast (WCAG AA passes).

Color values

HEX	#243D8D
RGB	rgb(36, 61, 141)
HSL	hsl(226, 59%, 35%)
HSV	hsv(226, 74%, 55%)
CMYK	cmyk(74.5%, 56.7%, 0%, 44.7%)
CIE-LAB	lab(28.47, 19.89, -47.25)
CIE-LCH	lch(28.47, 51.27, 292.83°)
OKLab	oklab(39.07% -0.0077 -0.1361)
OKLCH	oklch(39.07% 0.136 266.8)
XYZ	xyz(7.2023, 5.6349, 25.9022)
Luminance	0.0564 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243D8D #8D7424

analogous

#24728D #243D8D #3F248D

triadic

#243D8D #8D243D #3D8D24

tetradic

#243D8D #8D2472 #8D7424 #248D3F

square

#243D8D #8D2472 #8D7424 #248D3F

split-complementary

#243D8D #8D3F24 #728D24

monochromatic

#0B132B #18285C #243D8D #3052BE #5775D4

Accessibility & contrast

On white

9.87

#243D8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#243D8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243D8D

9.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243D8D	#FFFFFF	#000000	##FFFFFF
##243D8D	1.00	9.87	2.13	9.87
#FFFFFF	9.87	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004890

Deuteranopia (green-blind)

#003F8B

Tritanopia (blue-blind)

#00515F

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #243d8d;
/* rgb */ color: rgb(36, 61, 141);
/* oklch */ color: oklch(39.1% 0.136 266.8);

Tailwind

colors: {
  custom: {
    50: '#6e72af',
    500: '#243d8d',
    950: '#000000',
  },
}

SCSS

$custom: #243d8d;
$custom-light: #6e72af;
$custom-dark: #000000;

JSON

{
  "hex": "#243d8d",
  "rgb": {
    "r": 36,
    "g": 61,
    "b": 141
  },
  "hsl": {
    "h": 225.714,
    "s": 59.322,
    "l": 34.706
  },
  "oklch": {
    "l": 0.39073,
    "c": 0.13635,
    "h": 266.8
  },
  "luminance": 0.05636
}

Semantic roles & 50–950 ramp

primary

#243D8D

secondary

#B8A154

accent

#BD45E3

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #243D8D

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

Preview Lab → · Contrast checker → · Palette generator →