#243F9D#243F9D

#243F9D is a dark, vivid blue. Relative luminance 0.064; OKLCH L 40.9% C 0.156 H 266.9°. Best body text is #FFFFFF at 9.24:1 contrast (WCAG AA passes).

Color values

HEX	#243F9D
RGB	rgb(36, 63, 157)
HSL	hsl(227, 63%, 38%)
HSV	hsv(227, 77%, 62%)
CMYK	cmyk(77.1%, 59.9%, 0%, 38.4%)
CIE-LAB	lab(30.31, 24.75, -54.04)
CIE-LCH	lch(30.31, 59.44, 294.61°)
OKLab	oklab(40.86% -0.0085 -0.1561)
OKLCH	oklch(40.86% 0.156 266.9)
XYZ	xyz(8.5887, 6.3635, 32.6674)
Luminance	0.0636 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243F9D #9D8224

analogous

#247B9D #243F9D #46249D

triadic

#243F9D #9D243F #3F9D24

tetradic

#243F9D #9D247B #9D8224 #249D46

square

#243F9D #9D247B #9D8224 #249D46

split-complementary

#243F9D #9D4624 #7B9D24

monochromatic

#0D1739 #192B6B #243F9D #2F53CF #617CDB

Accessibility & contrast

On white

9.24

#243F9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#243F9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243F9D

9.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243F9D	#FFFFFF	#000000	##FFFFFF
##243F9D	1.00	9.24	2.27	9.24
#FFFFFF	9.24	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA0

Deuteranopia (green-blind)

#00429B

Tritanopia (blue-blind)

#005767

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #243f9d;
/* rgb */ color: rgb(36, 63, 157);
/* oklch */ color: oklch(40.9% 0.156 266.9);

Tailwind

colors: {
  custom: {
    50: '#7273bb',
    500: '#243f9d',
    950: '#000000',
  },
}

SCSS

$custom: #243f9d;
$custom-light: #7273bb;
$custom-dark: #000000;

JSON

{
  "hex": "#243f9d",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 157
  },
  "hsl": {
    "h": 226.612,
    "s": 62.694,
    "l": 37.843
  },
  "oklch": {
    "l": 0.40856,
    "c": 0.1563,
    "h": 266.9
  },
  "luminance": 0.06364
}

Semantic roles & 50–950 ramp

primary

#243F9D

secondary

#C0AA5D

accent

#C142E6

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #243F9D

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

Preview Lab → · Contrast checker → · Palette generator →