#243FA8#243FA8

#243FA8 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.8% C 0.171 H 267.2°. Best body text is #FFFFFF at 8.93:1 contrast (WCAG AA passes).

Color values

HEX	#243FA8
RGB	rgb(36, 63, 168)
HSL	hsl(228, 65%, 40%)
HSV	hsv(228, 79%, 66%)
CMYK	cmyk(78.6%, 62.5%, 0%, 34.1%)
CIE-LAB	lab(31.25, 28.97, -59.15)
CIE-LCH	lch(31.25, 65.87, 296.09°)
OKLab	oklab(41.84% -0.0084 -0.1711)
OKLCH	oklch(41.84% 0.171 267.2)
XYZ	xyz(9.5705, 6.7561, 37.8379)
Luminance	0.0676 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243FA8 #A88D24

analogous

#2481A8 #243FA8 #4B24A8

triadic

#243FA8 #A8243F #3FA824

tetradic

#243FA8 #A82481 #A88D24 #24A84B

square

#243FA8 #A82481 #A88D24 #24A84B

split-complementary

#243FA8 #A84B24 #81A824

monochromatic

#0E1943 #192C76 #243FA8 #3556D4 #6880DF

Accessibility & contrast

On white

8.93

#243FA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#243FA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243FA8

8.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243FA8	#FFFFFF	#000000	##FFFFFF
##243FA8	1.00	8.93	2.35	8.93
#FFFFFF	8.93	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050AB

Deuteranopia (green-blind)

#0043A6

Tritanopia (blue-blind)

#005A6D

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #243fa8;
/* rgb */ color: rgb(36, 63, 168);
/* oklch */ color: oklch(41.8% 0.171 267.2);

Tailwind

colors: {
  custom: {
    50: '#7573c3',
    500: '#243fa8',
    950: '#000000',
  },
}

SCSS

$custom: #243fa8;
$custom-light: #7573c3;
$custom-dark: #000000;

JSON

{
  "hex": "#243fa8",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 168
  },
  "hsl": {
    "h": 227.727,
    "s": 64.706,
    "l": 40
  },
  "oklch": {
    "l": 0.41841,
    "c": 0.17127,
    "h": 267.2
  },
  "luminance": 0.06757
}

Semantic roles & 50–950 ramp

primary

#243FA8

secondary

#C4B163

accent

#C540E8

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #243FA8

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

Preview Lab → · Contrast checker → · Palette generator →