#243D8A#243D8A

#243D8A is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.8% C 0.132 H 266.6°. Best body text is #FFFFFF at 9.95:1 contrast (WCAG AA passes).

Color values

HEX	#243D8A
RGB	rgb(36, 61, 138)
HSL	hsl(225, 59%, 34%)
HSV	hsv(225, 74%, 54%)
CMYK	cmyk(73.9%, 55.8%, 0%, 45.9%)
CIE-LAB	lab(28.24, 18.72, -45.77)
CIE-LCH	lch(28.24, 49.45, 292.24°)
OKLab	oklab(38.82% -0.0079 -0.1318)
OKLCH	oklch(38.82% 0.132 266.6)
XYZ	xyz(6.9821, 5.5468, 24.7425)
Luminance	0.0555 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243D8A #8A7124

analogous

#24708A #243D8A #3E248A

triadic

#243D8A #8A243D #3D8A24

tetradic

#243D8A #8A2470 #8A7124 #248A3E

square

#243D8A #8A2470 #8A7124 #248A3E

split-complementary

#243D8A #8A3E24 #708A24

monochromatic

#0B1229 #172859 #243D8A #3152BB #5674D3

Accessibility & contrast

On white

9.95

#243D8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#243D8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243D8A

9.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243D8A	#FFFFFF	#000000	##FFFFFF
##243D8A	1.00	9.95	2.11	9.95
#FFFFFF	9.95	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00488D

Deuteranopia (green-blind)

#003E88

Tritanopia (blue-blind)

#00505D

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #243d8a;
/* rgb */ color: rgb(36, 61, 138);
/* oklch */ color: oklch(38.8% 0.132 266.6);

Tailwind

colors: {
  custom: {
    50: '#6d72ad',
    500: '#243d8a',
    950: '#000000',
  },
}

SCSS

$custom: #243d8a;
$custom-light: #6d72ad;
$custom-dark: #000000;

JSON

{
  "hex": "#243d8a",
  "rgb": {
    "r": 36,
    "g": 61,
    "b": 138
  },
  "hsl": {
    "h": 225.294,
    "s": 58.621,
    "l": 34.118
  },
  "oklch": {
    "l": 0.38824,
    "c": 0.13202,
    "h": 266.6
  },
  "luminance": 0.05548
}

Semantic roles & 50–950 ramp

primary

#243D8A

secondary

#B79E53

accent

#BC46E2

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #243D8A

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

Preview Lab → · Contrast checker → · Palette generator →