#243B8E#243B8E

#243B8E is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.7% C 0.140 H 267.6°. Best body text is #FFFFFF at 10.04:1 contrast (WCAG AA passes).

Color values

HEX	#243B8E
RGB	rgb(36, 59, 142)
HSL	hsl(227, 60%, 35%)
HSV	hsv(227, 75%, 56%)
CMYK	cmyk(74.6%, 58.5%, 0%, 44.3%)
CIE-LAB	lab(27.99, 21.66, -48.64)
CIE-LCH	lch(27.99, 53.25, 294.00°)
OKLab	oklab(38.74% -0.006 -0.1403)
OKLCH	oklch(38.74% 0.14 267.6)
XYZ	xyz(7.1723, 5.4552, 26.2609)
Luminance	0.0546 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243B8E #8E7724

analogous

#24708E #243B8E #42248E

triadic

#243B8E #8E243B #3B8E24

tetradic

#243B8E #8E2470 #8E7724 #248E42

square

#243B8E #8E2470 #8E7724 #248E42

split-complementary

#243B8E #8E4224 #708E24

monochromatic

#0B122C #18275D #243B8E #304FBF #5873D5

Accessibility & contrast

On white

10.04

#243B8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#243B8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243B8E

10.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243B8E	#FFFFFF	#000000	##FFFFFF
##243B8E	1.00	10.04	2.09	10.04
#FFFFFF	10.04	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004791

Deuteranopia (green-blind)

#003D8C

Tritanopia (blue-blind)

#00505E

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #243b8e;
/* rgb */ color: rgb(36, 59, 142);
/* oklch */ color: oklch(38.7% 0.140 267.6);

Tailwind

colors: {
  custom: {
    50: '#6e70b0',
    500: '#243b8e',
    950: '#000000',
  },
}

SCSS

$custom: #243b8e;
$custom-light: #6e70b0;
$custom-dark: #000000;

JSON

{
  "hex": "#243b8e",
  "rgb": {
    "r": 36,
    "g": 59,
    "b": 142
  },
  "hsl": {
    "h": 226.981,
    "s": 59.551,
    "l": 34.902
  },
  "oklch": {
    "l": 0.38739,
    "c": 0.14039,
    "h": 267.6
  },
  "luminance": 0.05456
}

Semantic roles & 50–950 ramp

primary

#243B8E

secondary

#B9A355

accent

#C145E3

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #243B8E

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

Preview Lab → · Contrast checker → · Palette generator →