#343FA9#343FA9

#343FA9 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.8% C 0.168 H 272.5°. Best body text is #FFFFFF at 8.64:1 contrast (WCAG AA passes).

Color values

HEX	#343FA9
RGB	rgb(52, 63, 169)
HSL	hsl(234, 53%, 43%)
HSV	hsv(234, 69%, 66%)
CMYK	cmyk(69.2%, 62.7%, 0%, 33.7%)
CIE-LAB	lab(32.14, 31.27, -58.25)
CIE-LCH	lch(32.14, 66.12, 298.23°)
OKLab	oklab(42.75% 0.0073 -0.1681)
OKLCH	oklch(42.75% 0.168 272.5)
XYZ	xyz(10.3527, 7.1487, 38.3627)
Luminance	0.0715 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343FA9 #A99E34

analogous

#3479A9 #343FA9 #6334A9

triadic

#343FA9 #A9343F #3FA934

tetradic

#343FA9 #A93479 #A99E34 #34A963

square

#343FA9 #A93479 #A99E34 #34A963

split-complementary

#343FA9 #A96334 #79A934

monochromatic

#171C4B #262E7A #343FA9 #515CC9 #8088D8

Accessibility & contrast

On white

8.64

#343FA9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#343FA9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343FA9

8.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343FA9	#FFFFFF	#000000	##FFFFFF
##343FA9	1.00	8.64	2.43	8.64
#FFFFFF	8.64	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051AC

Deuteranopia (green-blind)

#0046A7

Tritanopia (blue-blind)

#005A6E

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #343fa9;
/* rgb */ color: rgb(52, 63, 169);
/* oklch */ color: oklch(42.8% 0.168 272.5);

Tailwind

colors: {
  custom: {
    50: '#7b74c3',
    500: '#343fa9',
    950: '#000000',
  },
}

SCSS

$custom: #343fa9;
$custom-light: #7b74c3;
$custom-dark: #000000;

JSON

{
  "hex": "#343fa9",
  "rgb": {
    "r": 52,
    "g": 63,
    "b": 169
  },
  "hsl": {
    "h": 234.359,
    "s": 52.941,
    "l": 43.333
  },
  "oklch": {
    "l": 0.42751,
    "c": 0.16823,
    "h": 272.5
  },
  "luminance": 0.0715
}

Semantic roles & 50–950 ramp

primary

#343FA9

secondary

#C1BA78

accent

#CF4BDC

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #343FA9

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

Preview Lab → · Contrast checker → · Palette generator →