#243D8F#243D8F

#243D8F is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.2% C 0.139 H 266.9°. Best body text is #FFFFFF at 9.82:1 contrast (WCAG AA passes).

Color values

HEX	#243D8F
RGB	rgb(36, 61, 143)
HSL	hsl(226, 60%, 35%)
HSV	hsv(226, 75%, 56%)
CMYK	cmyk(74.8%, 57.3%, 0%, 43.9%)
CIE-LAB	lab(28.63, 20.68, -48.23)
CIE-LCH	lch(28.63, 52.47, 293.21°)
OKLab	oklab(39.24% -0.0075 -0.139)
OKLCH	oklch(39.24% 0.139 266.9)
XYZ	xyz(7.3525, 5.6949, 26.6930)
Luminance	0.0570 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243D8F #8F7624

analogous

#24738F #243D8F #40248F

triadic

#243D8F #8F243D #3D8F24

tetradic

#243D8F #8F2473 #8F7624 #248F40

square

#243D8F #8F2473 #8F7624 #248F40

split-complementary

#243D8F #8F4024 #738F24

monochromatic

#0B132D #18285E #243D8F #3052C0 #5875D5

Accessibility & contrast

On white

9.82

#243D8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#243D8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243D8F

9.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243D8F	#FFFFFF	#000000	##FFFFFF
##243D8F	1.00	9.82	2.14	9.82
#FFFFFF	9.82	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004992

Deuteranopia (green-blind)

#003F8D

Tritanopia (blue-blind)

#005160

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #243d8f;
/* rgb */ color: rgb(36, 61, 143);
/* oklch */ color: oklch(39.2% 0.139 266.9);

Tailwind

colors: {
  custom: {
    50: '#6f72b0',
    500: '#243d8f',
    950: '#000000',
  },
}

SCSS

$custom: #243d8f;
$custom-light: #6f72b0;
$custom-dark: #000000;

JSON

{
  "hex": "#243d8f",
  "rgb": {
    "r": 36,
    "g": 61,
    "b": 143
  },
  "hsl": {
    "h": 225.981,
    "s": 59.777,
    "l": 35.098
  },
  "oklch": {
    "l": 0.39241,
    "c": 0.13921,
    "h": 266.9
  },
  "luminance": 0.05696
}

Semantic roles & 50–950 ramp

primary

#243D8F

secondary

#B9A255

accent

#BE45E3

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080711

muted

#7B7A80

Preview Lab

Preview with #243D8F

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

Preview Lab → · Contrast checker → · Palette generator →