#243CB0#243CB0

#243CB0 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 42.0% C 0.185 H 267.9°. Best body text is #FFFFFF at 8.94:1 contrast (WCAG AA passes).

Color values

HEX	#243CB0
RGB	rgb(36, 60, 176)
HSL	hsl(230, 66%, 42%)
HSV	hsv(230, 80%, 69%)
CMYK	cmyk(79.5%, 65.9%, 0%, 31%)
CIE-LAB	lab(31.21, 33.95, -64.00)
CIE-LCH	lch(31.21, 72.44, 297.94°)
OKLab	oklab(42.03% -0.0069 -0.1853)
OKLCH	oklch(42.03% 0.185 267.9)
XYZ	xyz(10.1772, 6.7402, 41.8305)
Luminance	0.0674 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243CB0 #B09824

analogous

#2482B0 #243CB0 #5224B0

triadic

#243CB0 #B0243C #3CB024

tetradic

#243CB0 #B02482 #B09824 #24B052

square

#243CB0 #B02482 #B09824 #24B052

split-complementary

#243CB0 #B05224 #82B024

monochromatic

#0F194A #1A2B7D #243CB0 #3A55D7 #6D81E1

Accessibility & contrast

On white

8.94

#243CB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#243CB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243CB0

8.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243CB0	#FFFFFF	#000000	##FFFFFF
##243CB0	1.00	8.94	2.35	8.94
#FFFFFF	8.94	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B4

Deuteranopia (green-blind)

#0043AE

Tritanopia (blue-blind)

#005B70

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #243cb0;
/* rgb */ color: rgb(36, 60, 176);
/* oklch */ color: oklch(42.0% 0.185 267.9);

Tailwind

colors: {
  custom: {
    50: '#7771c9',
    500: '#243cb0',
    950: '#000000',
  },
}

SCSS

$custom: #243cb0;
$custom-light: #7771c9;
$custom-dark: #000000;

JSON

{
  "hex": "#243cb0",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 176
  },
  "hsl": {
    "h": 229.714,
    "s": 66.038,
    "l": 41.569
  },
  "oklch": {
    "l": 0.42033,
    "c": 0.1854,
    "h": 267.9
  },
  "luminance": 0.06741
}

Semantic roles & 50–950 ramp

primary

#243CB0

secondary

#C8B768

accent

#CC3FE9

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #243CB0

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

Preview Lab → · Contrast checker → · Palette generator →