#243F8D#243F8D

#243F8D is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.5% C 0.134 H 266.0°. Best body text is #FFFFFF at 9.67:1 contrast (WCAG AA passes).

Color values

HEX	#243F8D
RGB	rgb(36, 63, 141)
HSL	hsl(225, 59%, 35%)
HSV	hsv(225, 74%, 55%)
CMYK	cmyk(74.5%, 55.3%, 0%, 44.7%)
CIE-LAB	lab(29.04, 18.52, -46.33)
CIE-LCH	lch(29.04, 49.90, 291.79°)
OKLab	oklab(39.5% -0.0093 -0.1334)
OKLCH	oklch(39.5% 0.134 266)
XYZ	xyz(7.3111, 5.8524, 25.9385)
Luminance	0.0585 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243F8D #8D7224

analogous

#24748D #243F8D #3D248D

triadic

#243F8D #8D243F #3F8D24

tetradic

#243F8D #8D2474 #8D7224 #248D3D

square

#243F8D #8D2474 #8D7224 #248D3D

split-complementary

#243F8D #8D3D24 #748D24

monochromatic

#0B132B #18295C #243F8D #3055BE #5777D4

Accessibility & contrast

On white

9.67

#243F8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#243F8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243F8D

9.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243F8D	#FFFFFF	#000000	##FFFFFF
##243F8D	1.00	9.67	2.17	9.67
#FFFFFF	9.67	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#014990

Deuteranopia (green-blind)

#00408B

Tritanopia (blue-blind)

#00525F

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #243f8d;
/* rgb */ color: rgb(36, 63, 141);
/* oklch */ color: oklch(39.5% 0.134 266.0);

Tailwind

colors: {
  custom: {
    50: '#6e73af',
    500: '#243f8d',
    950: '#000000',
  },
}

SCSS

$custom: #243f8d;
$custom-light: #6e73af;
$custom-dark: #000000;

JSON

{
  "hex": "#243f8d",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 141
  },
  "hsl": {
    "h": 224.571,
    "s": 59.322,
    "l": 34.706
  },
  "oklch": {
    "l": 0.39499,
    "c": 0.13374,
    "h": 266
  },
  "luminance": 0.05853
}

Semantic roles & 50–950 ramp

primary

#243F8D

secondary

#B89F54

accent

#BA45E3

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #243F8D

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

Preview Lab → · Contrast checker → · Palette generator →