#243FA6#243FA6

#243FA6 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.7% C 0.169 H 267.1°. Best body text is #FFFFFF at 8.99:1 contrast (WCAG AA passes).

Color values

HEX	#243FA6
RGB	rgb(36, 63, 166)
HSL	hsl(228, 64%, 40%)
HSV	hsv(228, 78%, 65%)
CMYK	cmyk(78.3%, 62%, 0%, 34.9%)
CIE-LAB	lab(31.07, 28.21, -58.24)
CIE-LCH	lch(31.07, 64.71, 295.85°)
OKLab	oklab(41.66% -0.0084 -0.1684)
OKLCH	oklch(41.66% 0.169 267.1)
XYZ	xyz(9.3856, 6.6822, 36.8641)
Luminance	0.0668 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243FA6 #A68B24

analogous

#2480A6 #243FA6 #4A24A6

triadic

#243FA6 #A6243F #3FA624

tetradic

#243FA6 #A62480 #A68B24 #24A64A

square

#243FA6 #A62480 #A68B24 #24A64A

split-complementary

#243FA6 #A64A24 #80A624

monochromatic

#0E1941 #192C74 #243FA6 #3455D3 #667FDE

Accessibility & contrast

On white

8.99

#243FA6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#243FA6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243FA6

8.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243FA6	#FFFFFF	#000000	##FFFFFF
##243FA6	1.00	8.99	2.34	8.99
#FFFFFF	8.99	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA9

Deuteranopia (green-blind)

#0043A4

Tritanopia (blue-blind)

#005A6C

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #243fa6;
/* rgb */ color: rgb(36, 63, 166);
/* oklch */ color: oklch(41.7% 0.169 267.1);

Tailwind

colors: {
  custom: {
    50: '#7473c1',
    500: '#243fa6',
    950: '#000000',
  },
}

SCSS

$custom: #243fa6;
$custom-light: #7473c1;
$custom-dark: #000000;

JSON

{
  "hex": "#243fa6",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 166
  },
  "hsl": {
    "h": 227.538,
    "s": 64.356,
    "l": 39.608
  },
  "oklch": {
    "l": 0.41659,
    "c": 0.16858,
    "h": 267.1
  },
  "luminance": 0.06683
}

Semantic roles & 50–950 ramp

primary

#243FA6

secondary

#C4AF62

accent

#C540E7

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #243FA6

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

Preview Lab → · Contrast checker → · Palette generator →