#243F8E#243F8E

#243F8E is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.6% C 0.135 H 266.1°. Best body text is #FFFFFF at 9.65:1 contrast (WCAG AA passes).

Color values

HEX	#243F8E
RGB	rgb(36, 63, 142)
HSL	hsl(225, 60%, 35%)
HSV	hsv(225, 75%, 56%)
CMYK	cmyk(74.6%, 55.6%, 0%, 44.3%)
CIE-LAB	lab(29.11, 18.91, -46.82)
CIE-LCH	lch(29.11, 50.50, 291.99°)
OKLab	oklab(39.58% -0.0092 -0.1348)
OKLCH	oklch(39.58% 0.135 266.1)
XYZ	xyz(7.3858, 5.8823, 26.3321)
Luminance	0.0588 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243F8E #8E7324

analogous

#24748E #243F8E #3E248E

triadic

#243F8E #8E243F #3F8E24

tetradic

#243F8E #8E2474 #8E7324 #248E3E

square

#243F8E #8E2474 #8E7324 #248E3E

split-complementary

#243F8E #8E3E24 #748E24

monochromatic

#0B142C #18295D #243F8E #3055BF #5878D5

Accessibility & contrast

On white

9.65

#243F8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#243F8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243F8E

9.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243F8E	#FFFFFF	#000000	##FFFFFF
##243F8E	1.00	9.65	2.18	9.65
#FFFFFF	9.65	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A91

Deuteranopia (green-blind)

#00408C

Tritanopia (blue-blind)

#005260

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #243f8e;
/* rgb */ color: rgb(36, 63, 142);
/* oklch */ color: oklch(39.6% 0.135 266.1);

Tailwind

colors: {
  custom: {
    50: '#6e73b0',
    500: '#243f8e',
    950: '#000000',
  },
}

SCSS

$custom: #243f8e;
$custom-light: #6e73b0;
$custom-dark: #000000;

JSON

{
  "hex": "#243f8e",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 142
  },
  "hsl": {
    "h": 224.717,
    "s": 59.551,
    "l": 34.902
  },
  "oklch": {
    "l": 0.39581,
    "c": 0.13517,
    "h": 266.1
  },
  "luminance": 0.05883
}

Semantic roles & 50–950 ramp

primary

#243F8E

secondary

#B99F55

accent

#BB45E3

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #243F8E

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

Preview Lab → · Contrast checker → · Palette generator →