#243FA7#243FA7

#243FA7 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.8% C 0.170 H 267.2°. Best body text is #FFFFFF at 8.96:1 contrast (WCAG AA passes).

Color values

HEX	#243FA7
RGB	rgb(36, 63, 167)
HSL	hsl(228, 65%, 40%)
HSV	hsv(228, 78%, 65%)
CMYK	cmyk(78.4%, 62.3%, 0%, 34.5%)
CIE-LAB	lab(31.16, 28.59, -58.70)
CIE-LCH	lch(31.16, 65.29, 295.97°)
OKLab	oklab(41.75% -0.0084 -0.1697)
OKLCH	oklch(41.75% 0.17 267.2)
XYZ	xyz(9.4777, 6.7190, 37.3491)
Luminance	0.0672 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243FA7 #A78C24

analogous

#2480A7 #243FA7 #4B24A7

triadic

#243FA7 #A7243F #3FA724

tetradic

#243FA7 #A72480 #A78C24 #24A74B

square

#243FA7 #A72480 #A78C24 #24A74B

split-complementary

#243FA7 #A74B24 #80A724

monochromatic

#0E1942 #192C75 #243FA7 #3555D3 #6780DE

Accessibility & contrast

On white

8.96

#243FA7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#243FA7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243FA7

8.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243FA7	#FFFFFF	#000000	##FFFFFF
##243FA7	1.00	8.96	2.34	8.96
#FFFFFF	8.96	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050AA

Deuteranopia (green-blind)

#0043A5

Tritanopia (blue-blind)

#005A6D

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #243fa7;
/* rgb */ color: rgb(36, 63, 167);
/* oklch */ color: oklch(41.8% 0.170 267.2);

Tailwind

colors: {
  custom: {
    50: '#7473c2',
    500: '#243fa7',
    950: '#000000',
  },
}

SCSS

$custom: #243fa7;
$custom-light: #7473c2;
$custom-dark: #000000;

JSON

{
  "hex": "#243fa7",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 167
  },
  "hsl": {
    "h": 227.634,
    "s": 64.532,
    "l": 39.804
  },
  "oklch": {
    "l": 0.4175,
    "c": 0.16993,
    "h": 267.2
  },
  "luminance": 0.0672
}

Semantic roles & 50–950 ramp

primary

#243FA7

secondary

#C4B063

accent

#C540E8

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #243FA7

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

Preview Lab → · Contrast checker → · Palette generator →