#243D81#243D81

#243D81 is a dark, moderate blue. Relative luminance 0.053; OKLCH L 38.1% C 0.119 H 265.8°. Best body text is #FFFFFF at 10.20:1 contrast (WCAG AA passes).

Color values

HEX	#243D81
RGB	rgb(36, 61, 129)
HSL	hsl(224, 56%, 32%)
HSV	hsv(224, 72%, 51%)
CMYK	cmyk(72.1%, 52.7%, 0%, 49.4%)
CIE-LAB	lab(27.56, 15.19, -41.27)
CIE-LCH	lch(27.56, 43.97, 290.20°)
OKLab	oklab(38.1% -0.0087 -0.1185)
OKLCH	oklch(38.1% 0.119 265.8)
XYZ	xyz(6.3574, 5.2969, 21.4520)
Luminance	0.0530 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243D81 #816824

analogous

#246C81 #243D81 #392481

triadic

#243D81 #81243D #3D8124

tetradic

#243D81 #81246C #816824 #248139

square

#243D81 #81246C #816824 #248139

split-complementary

#243D81 #813924 #6C8124

monochromatic

#091021 #172651 #243D81 #3154B1 #5173CE

Accessibility & contrast

On white

10.20

#243D81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#243D81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243D81

10.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243D81	#FFFFFF	#000000	##FFFFFF
##243D81	1.00	10.20	2.06	10.20
#FFFFFF	10.20	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#144683

Deuteranopia (green-blind)

#003D80

Tritanopia (blue-blind)

#004D59

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #243d81;
/* rgb */ color: rgb(36, 61, 129);
/* oklch */ color: oklch(38.1% 0.119 265.8);

Tailwind

colors: {
  custom: {
    50: '#6b72a6',
    500: '#243d81',
    950: '#000000',
  },
}

SCSS

$custom: #243d81;
$custom-light: #6b72a6;
$custom-dark: #000000;

JSON

{
  "hex": "#243d81",
  "rgb": {
    "r": 36,
    "g": 61,
    "b": 129
  },
  "hsl": {
    "h": 223.871,
    "s": 56.364,
    "l": 32.353
  },
  "oklch": {
    "l": 0.38098,
    "c": 0.11885,
    "h": 265.8
  },
  "luminance": 0.05298
}

Semantic roles & 50–950 ramp

primary

#243D81

secondary

#B2974E

accent

#B748E0

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #243D81

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

Preview Lab → · Contrast checker → · Palette generator →