#243F8F#243F8F

#243F8F is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.7% C 0.137 H 266.2°. Best body text is #FFFFFF at 9.62:1 contrast (WCAG AA passes).

Color values

HEX	#243F8F
RGB	rgb(36, 63, 143)
HSL	hsl(225, 60%, 35%)
HSV	hsv(225, 75%, 56%)
CMYK	cmyk(74.8%, 55.9%, 0%, 43.9%)
CIE-LAB	lab(29.19, 19.30, -47.31)
CIE-LCH	lch(29.19, 51.10, 292.19°)
OKLab	oklab(39.66% -0.0092 -0.1363)
OKLCH	oklch(39.66% 0.137 266.2)
XYZ	xyz(7.4613, 5.9125, 26.7293)
Luminance	0.0591 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243F8F #8F7424

analogous

#24748F #243F8F #3F248F

triadic

#243F8F #8F243F #3F8F24

tetradic

#243F8F #8F2474 #8F7424 #248F3F

square

#243F8F #8F2474 #8F7424 #248F3F

split-complementary

#243F8F #8F3F24 #748F24

monochromatic

#0B142D #18295E #243F8F #3055C0 #5878D5

Accessibility & contrast

On white

9.62

#243F8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#243F8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243F8F

9.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243F8F	#FFFFFF	#000000	##FFFFFF
##243F8F	1.00	9.62	2.18	9.62
#FFFFFF	9.62	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A92

Deuteranopia (green-blind)

#00408D

Tritanopia (blue-blind)

#005260

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #243f8f;
/* rgb */ color: rgb(36, 63, 143);
/* oklch */ color: oklch(39.7% 0.137 266.2);

Tailwind

colors: {
  custom: {
    50: '#6e73b0',
    500: '#243f8f',
    950: '#000000',
  },
}

SCSS

$custom: #243f8f;
$custom-light: #6e73b0;
$custom-dark: #000000;

JSON

{
  "hex": "#243f8f",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 143
  },
  "hsl": {
    "h": 224.86,
    "s": 59.777,
    "l": 35.098
  },
  "oklch": {
    "l": 0.39663,
    "c": 0.13661,
    "h": 266.2
  },
  "luminance": 0.05913
}

Semantic roles & 50–950 ramp

primary

#243F8F

secondary

#B9A055

accent

#BB45E3

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080811

muted

#7B7B80

Preview Lab

Preview with #243F8F

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

Preview Lab → · Contrast checker → · Palette generator →