#243B8D#243B8D

#243B8D is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.7% C 0.139 H 267.5°. Best body text is #FFFFFF at 10.07:1 contrast (WCAG AA passes).

Color values

HEX	#243B8D
RGB	rgb(36, 59, 141)
HSL	hsl(227, 59%, 35%)
HSV	hsv(227, 74%, 55%)
CMYK	cmyk(74.5%, 58.2%, 0%, 44.7%)
CIE-LAB	lab(27.91, 21.27, -48.16)
CIE-LCH	lch(27.91, 52.64, 293.83°)
OKLab	oklab(38.65% -0.006 -0.1388)
OKLCH	oklch(38.65% 0.139 267.5)
XYZ	xyz(7.0976, 5.4253, 25.8673)
Luminance	0.0543 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243B8D #8D7624

analogous

#24708D #243B8D #41248D

triadic

#243B8D #8D243B #3B8D24

tetradic

#243B8D #8D2470 #8D7624 #248D41

square

#243B8D #8D2470 #8D7624 #248D41

split-complementary

#243B8D #8D4124 #708D24

monochromatic

#0B122B #18275C #243B8D #304FBE #5773D4

Accessibility & contrast

On white

10.07

#243B8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#243B8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243B8D

10.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243B8D	#FFFFFF	#000000	##FFFFFF
##243B8D	1.00	10.07	2.09	10.07
#FFFFFF	10.07	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004790

Deuteranopia (green-blind)

#003D8B

Tritanopia (blue-blind)

#004F5E

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #243b8d;
/* rgb */ color: rgb(36, 59, 141);
/* oklch */ color: oklch(38.7% 0.139 267.5);

Tailwind

colors: {
  custom: {
    50: '#6e70af',
    500: '#243b8d',
    950: '#000000',
  },
}

SCSS

$custom: #243b8d;
$custom-light: #6e70af;
$custom-dark: #000000;

JSON

{
  "hex": "#243b8d",
  "rgb": {
    "r": 36,
    "g": 59,
    "b": 141
  },
  "hsl": {
    "h": 226.857,
    "s": 59.322,
    "l": 34.706
  },
  "oklch": {
    "l": 0.38653,
    "c": 0.13896,
    "h": 267.5
  },
  "luminance": 0.05426
}

Semantic roles & 50–950 ramp

primary

#243B8D

secondary

#B8A354

accent

#C045E3

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #243B8D

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

Preview Lab → · Contrast checker → · Palette generator →