#243DB0#243DB0

#243DB0 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.2% C 0.184 H 267.7°. Best body text is #FFFFFF at 8.86:1 contrast (WCAG AA passes).

Color values

HEX	#243DB0
RGB	rgb(36, 61, 176)
HSL	hsl(229, 66%, 42%)
HSV	hsv(229, 80%, 69%)
CMYK	cmyk(79.5%, 65.3%, 0%, 31%)
CIE-LAB	lab(31.45, 33.30, -63.60)
CIE-LCH	lch(31.45, 71.79, 297.64°)
OKLab	oklab(42.21% -0.0075 -0.1841)
OKLCH	oklch(42.21% 0.184 267.7)
XYZ	xyz(10.2300, 6.8460, 41.8481)
Luminance	0.0685 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243DB0 #B09724

analogous

#2483B0 #243DB0 #5124B0

triadic

#243DB0 #B0243D #3DB024

tetradic

#243DB0 #B02483 #B09724 #24B051

square

#243DB0 #B02483 #B09724 #24B051

split-complementary

#243DB0 #B05124 #83B024

monochromatic

#0F1A4A #1A2B7D #243DB0 #3A56D7 #6D82E1

Accessibility & contrast

On white

8.86

#243DB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#243DB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243DB0

8.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243DB0	#FFFFFF	#000000	##FFFFFF
##243DB0	1.00	8.86	2.37	8.86
#FFFFFF	8.86	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B4

Deuteranopia (green-blind)

#0043AE

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #243db0;
/* rgb */ color: rgb(36, 61, 176);
/* oklch */ color: oklch(42.2% 0.184 267.7);

Tailwind

colors: {
  custom: {
    50: '#7772c9',
    500: '#243db0',
    950: '#000000',
  },
}

SCSS

$custom: #243db0;
$custom-light: #7772c9;
$custom-dark: #000000;

JSON

{
  "hex": "#243db0",
  "rgb": {
    "r": 36,
    "g": 61,
    "b": 176
  },
  "hsl": {
    "h": 229.286,
    "s": 66.038,
    "l": 41.569
  },
  "oklch": {
    "l": 0.42214,
    "c": 0.18424,
    "h": 267.7
  },
  "luminance": 0.06847
}

Semantic roles & 50–950 ramp

primary

#243DB0

secondary

#C8B768

accent

#CB3FE9

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #243DB0

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

Preview Lab → · Contrast checker → · Palette generator →