#243A8A#243A8A

#243A8A is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.2% C 0.136 H 267.7°. Best body text is #FFFFFF at 10.26:1 contrast (WCAG AA passes).

Color values

HEX	#243A8A
RGB	rgb(36, 58, 138)
HSL	hsl(227, 59%, 34%)
HSV	hsv(227, 74%, 54%)
CMYK	cmyk(73.9%, 58%, 0%, 45.9%)
CIE-LAB	lab(27.40, 20.79, -47.14)
CIE-LCH	lch(27.40, 51.52, 293.80°)
OKLab	oklab(38.19% -0.0053 -0.1359)
OKLCH	oklch(38.19% 0.136 267.7)
XYZ	xyz(6.8265, 5.2354, 24.6906)
Luminance	0.0524 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243A8A #8A7424

analogous

#246D8A #243A8A #41248A

triadic

#243A8A #8A243A #3A8A24

tetradic

#243A8A #8A246D #8A7424 #248A41

square

#243A8A #8A246D #8A7424 #248A41

split-complementary

#243A8A #8A4124 #6D8A24

monochromatic

#0B1129 #172659 #243A8A #314EBB #5671D3

Accessibility & contrast

On white

10.26

#243A8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#243A8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243A8A

10.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243A8A	#FFFFFF	#000000	##FFFFFF
##243A8A	1.00	10.26	2.05	10.26
#FFFFFF	10.26	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468D

Deuteranopia (green-blind)

#003C88

Tritanopia (blue-blind)

#004E5C

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #243a8a;
/* rgb */ color: rgb(36, 58, 138);
/* oklch */ color: oklch(38.2% 0.136 267.7);

Tailwind

colors: {
  custom: {
    50: '#6e6fad',
    500: '#243a8a',
    950: '#000000',
  },
}

SCSS

$custom: #243a8a;
$custom-light: #6e6fad;
$custom-dark: #000000;

JSON

{
  "hex": "#243a8a",
  "rgb": {
    "r": 36,
    "g": 58,
    "b": 138
  },
  "hsl": {
    "h": 227.059,
    "s": 58.621,
    "l": 34.118
  },
  "oklch": {
    "l": 0.38189,
    "c": 0.13597,
    "h": 267.7
  },
  "luminance": 0.05236
}

Semantic roles & 50–950 ramp

primary

#243A8A

secondary

#B7A153

accent

#C046E2

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #243A8A

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

Preview Lab → · Contrast checker → · Palette generator →