#343AA9#343AA9

#343AA9 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.9% C 0.174 H 273.6°. Best body text is #FFFFFF at 9.04:1 contrast (WCAG AA passes).

Color values

HEX	#343AA9
RGB	rgb(52, 58, 169)
HSL	hsl(237, 53%, 43%)
HSV	hsv(237, 69%, 66%)
CMYK	cmyk(69.2%, 65.7%, 0%, 33.7%)
CIE-LAB	lab(30.93, 34.47, -60.24)
CIE-LCH	lch(30.93, 69.41, 299.78°)
OKLab	oklab(41.86% 0.0111 -0.1739)
OKLCH	oklch(41.86% 0.174 273.6)
XYZ	xyz(10.0883, 6.6198, 38.2745)
Luminance	0.0662 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343AA9 #A9A334

analogous

#3474A9 #343AA9 #6834A9

triadic

#343AA9 #A9343A #3AA934

tetradic

#343AA9 #A93474 #A9A334 #34A968

square

#343AA9 #A93474 #A9A334 #34A968

split-complementary

#343AA9 #A96834 #74A934

monochromatic

#171A4B #262A7A #343AA9 #5157C9 #8084D8

Accessibility & contrast

On white

9.04

#343AA9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#343AA9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343AA9

9.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343AA9	#FFFFFF	#000000	##FFFFFF
##343AA9	1.00	9.04	2.32	9.04
#FFFFFF	9.04	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EAD

Deuteranopia (green-blind)

#0043A7

Tritanopia (blue-blind)

#00576C

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #343aa9;
/* rgb */ color: rgb(52, 58, 169);
/* oklch */ color: oklch(41.9% 0.174 273.6);

Tailwind

colors: {
  custom: {
    50: '#7b70c4',
    500: '#343aa9',
    950: '#000000',
  },
}

SCSS

$custom: #343aa9;
$custom-light: #7b70c4;
$custom-dark: #000000;

JSON

{
  "hex": "#343aa9",
  "rgb": {
    "r": 52,
    "g": 58,
    "b": 169
  },
  "hsl": {
    "h": 236.923,
    "s": 52.941,
    "l": 43.333
  },
  "oklch": {
    "l": 0.41858,
    "c": 0.17429,
    "h": 273.6
  },
  "luminance": 0.06621
}

Semantic roles & 50–950 ramp

primary

#343AA9

secondary

#C1BD78

accent

#D54BDC

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #343AA9

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

Preview Lab → · Contrast checker → · Palette generator →