#243AB0#243AB0

#243AB0 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.7% C 0.188 H 268.2°. Best body text is #FFFFFF at 9.10:1 contrast (WCAG AA passes).

Color values

HEX	#243AB0
RGB	rgb(36, 58, 176)
HSL	hsl(231, 66%, 42%)
HSV	hsv(231, 80%, 69%)
CMYK	cmyk(79.5%, 67%, 0%, 31%)
CIE-LAB	lab(30.72, 35.23, -64.80)
CIE-LCH	lch(30.72, 73.76, 298.54°)
OKLab	oklab(41.68% -0.0059 -0.1876)
OKLCH	oklch(41.68% 0.188 268.2)
XYZ	xyz(10.0744, 6.5346, 41.7962)
Luminance	0.0654 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243AB0 #B09A24

analogous

#2480B0 #243AB0 #5424B0

triadic

#243AB0 #B0243A #3AB024

tetradic

#243AB0 #B02480 #B09A24 #24B054

square

#243AB0 #B02480 #B09A24 #24B054

split-complementary

#243AB0 #B05424 #80B024

monochromatic

#0F194A #1A297D #243AB0 #3A53D7 #6D7FE1

Accessibility & contrast

On white

9.10

#243AB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#243AB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243AB0

9.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243AB0	#FFFFFF	#000000	##FFFFFF
##243AB0	1.00	9.10	2.31	9.10
#FFFFFF	9.10	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB4

Deuteranopia (green-blind)

#0042AE

Tritanopia (blue-blind)

#005A70

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #243ab0;
/* rgb */ color: rgb(36, 58, 176);
/* oklch */ color: oklch(41.7% 0.188 268.2);

Tailwind

colors: {
  custom: {
    50: '#7770c9',
    500: '#243ab0',
    950: '#000000',
  },
}

SCSS

$custom: #243ab0;
$custom-light: #7770c9;
$custom-dark: #000000;

JSON

{
  "hex": "#243ab0",
  "rgb": {
    "r": 36,
    "g": 58,
    "b": 176
  },
  "hsl": {
    "h": 230.571,
    "s": 66.038,
    "l": 41.569
  },
  "oklch": {
    "l": 0.41679,
    "c": 0.1877,
    "h": 268.2
  },
  "luminance": 0.06536
}

Semantic roles & 50–950 ramp

primary

#243AB0

secondary

#C8B968

accent

#CE3FE9

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #243AB0

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

Preview Lab → · Contrast checker → · Palette generator →