#243A8D#243A8D

#243A8D is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.4% C 0.140 H 267.9°. Best body text is #FFFFFF at 10.17:1 contrast (WCAG AA passes).

Color values

HEX	#243A8D
RGB	rgb(36, 58, 141)
HSL	hsl(227, 59%, 35%)
HSV	hsv(227, 74%, 55%)
CMYK	cmyk(74.5%, 58.9%, 0%, 44.7%)
CIE-LAB	lab(27.64, 21.96, -48.60)
CIE-LCH	lch(27.64, 53.33, 294.31°)
OKLab	oklab(38.45% -0.0052 -0.1402)
OKLCH	oklch(38.45% 0.14 267.9)
XYZ	xyz(7.0467, 5.3235, 25.8503)
Luminance	0.0532 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243A8D #8D7724

analogous

#246E8D #243A8D #43248D

triadic

#243A8D #8D243A #3A8D24

tetradic

#243A8D #8D246E #8D7724 #248D43

square

#243A8D #8D246E #8D7724 #248D43

split-complementary

#243A8D #8D4324 #6E8D24

monochromatic

#0B122B #18265C #243A8D #304EBE #5771D4

Accessibility & contrast

On white

10.17

#243A8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#243A8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243A8D

10.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243A8D	#FFFFFF	#000000	##FFFFFF
##243A8D	1.00	10.17	2.06	10.17
#FFFFFF	10.17	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004690

Deuteranopia (green-blind)

#003D8B

Tritanopia (blue-blind)

#004F5D

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #243a8d;
/* rgb */ color: rgb(36, 58, 141);
/* oklch */ color: oklch(38.4% 0.140 267.9);

Tailwind

colors: {
  custom: {
    50: '#6e6faf',
    500: '#243a8d',
    950: '#000000',
  },
}

SCSS

$custom: #243a8d;
$custom-light: #6e6faf;
$custom-dark: #000000;

JSON

{
  "hex": "#243a8d",
  "rgb": {
    "r": 36,
    "g": 58,
    "b": 141
  },
  "hsl": {
    "h": 227.429,
    "s": 59.322,
    "l": 34.706
  },
  "oklch": {
    "l": 0.38446,
    "c": 0.14027,
    "h": 267.9
  },
  "luminance": 0.05324
}

Semantic roles & 50–950 ramp

primary

#243A8D

secondary

#B8A354

accent

#C245E3

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #243A8D

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

Preview Lab → · Contrast checker → · Palette generator →