#243C8A#243C8A

#243C8A is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.6% C 0.133 H 267.0°. Best body text is #FFFFFF at 10.06:1 contrast (WCAG AA passes).

Color values

HEX	#243C8A
RGB	rgb(36, 60, 138)
HSL	hsl(226, 59%, 34%)
HSV	hsv(226, 74%, 54%)
CMYK	cmyk(73.9%, 56.5%, 0%, 45.9%)
CIE-LAB	lab(27.96, 19.41, -46.23)
CIE-LCH	lch(27.96, 50.14, 292.77°)
OKLab	oklab(38.61% -0.007 -0.1332)
OKLCH	oklch(38.61% 0.133 267)
XYZ	xyz(6.9293, 5.4410, 24.7249)
Luminance	0.0544 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243C8A #8A7224

analogous

#246F8A #243C8A #3F248A

triadic

#243C8A #8A243C #3C8A24

tetradic

#243C8A #8A246F #8A7224 #248A3F

square

#243C8A #8A246F #8A7224 #248A3F

split-complementary

#243C8A #8A3F24 #6F8A24

monochromatic

#0B1229 #172759 #243C8A #3151BB #5673D3

Accessibility & contrast

On white

10.06

#243C8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#243C8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C8A

10.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243C8A	#FFFFFF	#000000	##FFFFFF
##243C8A	1.00	10.06	2.09	10.06
#FFFFFF	10.06	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478D

Deuteranopia (green-blind)

#003D88

Tritanopia (blue-blind)

#004F5D

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #243c8a;
/* rgb */ color: rgb(36, 60, 138);
/* oklch */ color: oklch(38.6% 0.133 267.0);

Tailwind

colors: {
  custom: {
    50: '#6d71ad',
    500: '#243c8a',
    950: '#000000',
  },
}

SCSS

$custom: #243c8a;
$custom-light: #6d71ad;
$custom-dark: #000000;

JSON

{
  "hex": "#243c8a",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 138
  },
  "hsl": {
    "h": 225.882,
    "s": 58.621,
    "l": 34.118
  },
  "oklch": {
    "l": 0.3861,
    "c": 0.13334,
    "h": 267
  },
  "luminance": 0.05442
}

Semantic roles & 50–950 ramp

primary

#243C8A

secondary

#B79F53

accent

#BD46E2

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #243C8A

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

Preview Lab → · Contrast checker → · Palette generator →