#343AA4#343AA4

#343AA4 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.4% C 0.168 H 273.9°. Best body text is #FFFFFF at 9.18:1 contrast (WCAG AA passes).

Color values

HEX	#343AA4
RGB	rgb(52, 58, 164)
HSL	hsl(237, 52%, 42%)
HSV	hsv(237, 68%, 64%)
CMYK	cmyk(68.3%, 64.6%, 0%, 35.7%)
CIE-LAB	lab(30.49, 32.71, -57.96)
CIE-LCH	lch(30.49, 66.55, 299.44°)
OKLab	oklab(41.4% 0.0115 -0.1672)
OKLCH	oklch(41.4% 0.168 273.9)
XYZ	xyz(9.6278, 6.4356, 35.8496)
Luminance	0.0644 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.62

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343AA4 #A49E34

analogous

#3472A4 #343AA4 #6634A4

triadic

#343AA4 #A4343A #3AA434

tetradic

#343AA4 #A43472 #A49E34 #34A466

square

#343AA4 #A43472 #A49E34 #34A466

split-complementary

#343AA4 #A46634 #72A434

monochromatic

#171947 #252A76 #343AA4 #4E55C7 #7D81D6

Accessibility & contrast

On white

9.18

#343AA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#343AA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343AA4

9.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343AA4	#FFFFFF	#000000	##FFFFFF
##343AA4	1.00	9.18	2.29	9.18
#FFFFFF	9.18	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA7

Deuteranopia (green-blind)

#0043A2

Tritanopia (blue-blind)

#005569

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #343aa4;
/* rgb */ color: rgb(52, 58, 164);
/* oklch */ color: oklch(41.4% 0.168 273.9);

Tailwind

colors: {
  custom: {
    50: '#7a70c0',
    500: '#343aa4',
    950: '#000000',
  },
}

SCSS

$custom: #343aa4;
$custom-light: #7a70c0;
$custom-dark: #000000;

JSON

{
  "hex": "#343aa4",
  "rgb": {
    "r": 52,
    "g": 58,
    "b": 164
  },
  "hsl": {
    "h": 236.786,
    "s": 51.852,
    "l": 42.353
  },
  "oklch": {
    "l": 0.41402,
    "c": 0.16762,
    "h": 273.9
  },
  "luminance": 0.06437
}

Semantic roles & 50–950 ramp

primary

#343AA4

secondary

#BFBB75

accent

#D44CDB

background

#F8F6FB

surface

#EFECF7

border

#CAC7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #343AA4

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

Preview Lab → · Contrast checker → · Palette generator →