#243B8B#243B8B

#243B8B is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.5% C 0.136 H 267.4°. Best body text is #FFFFFF at 10.13:1 contrast (WCAG AA passes).

Color values

HEX	#243B8B
RGB	rgb(36, 59, 139)
HSL	hsl(227, 59%, 34%)
HSV	hsv(227, 74%, 55%)
CMYK	cmyk(74.1%, 57.6%, 0%, 45.5%)
CIE-LAB	lab(27.75, 20.49, -47.18)
CIE-LCH	lch(27.75, 51.43, 293.47°)
OKLab	oklab(38.48% -0.0061 -0.136)
OKLCH	oklch(38.48% 0.136 267.4)
XYZ	xyz(6.9501, 5.3664, 25.0906)
Luminance	0.0537 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243B8B #8B7424

analogous

#246F8B #243B8B #41248B

triadic

#243B8B #8B243B #3B8B24

tetradic

#243B8B #8B246F #8B7424 #248B41

square

#243B8B #8B246F #8B7424 #248B41

split-complementary

#243B8B #8B4124 #6F8B24

monochromatic

#0B122A #17265A #243B8B #3150BC #5672D3

Accessibility & contrast

On white

10.13

#243B8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#243B8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243B8B

10.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243B8B	#FFFFFF	#000000	##FFFFFF
##243B8B	1.00	10.13	2.07	10.13
#FFFFFF	10.13	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468E

Deuteranopia (green-blind)

#003D89

Tritanopia (blue-blind)

#004F5D

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #243b8b;
/* rgb */ color: rgb(36, 59, 139);
/* oklch */ color: oklch(38.5% 0.136 267.4);

Tailwind

colors: {
  custom: {
    50: '#6e70ae',
    500: '#243b8b',
    950: '#000000',
  },
}

SCSS

$custom: #243b8b;
$custom-light: #6e70ae;
$custom-dark: #000000;

JSON

{
  "hex": "#243b8b",
  "rgb": {
    "r": 36,
    "g": 59,
    "b": 139
  },
  "hsl": {
    "h": 226.602,
    "s": 58.857,
    "l": 34.314
  },
  "oklch": {
    "l": 0.38483,
    "c": 0.1361,
    "h": 267.4
  },
  "luminance": 0.05367
}

Semantic roles & 50–950 ramp

primary

#243B8B

secondary

#B7A153

accent

#BF46E2

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #243B8B

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

Preview Lab → · Contrast checker → · Palette generator →