#343AA8#343AA8

#343AA8 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.8% C 0.173 H 273.7°. Best body text is #FFFFFF at 9.07:1 contrast (WCAG AA passes).

Color values

HEX	#343AA8
RGB	rgb(52, 58, 168)
HSL	hsl(237, 53%, 43%)
HSV	hsv(237, 69%, 66%)
CMYK	cmyk(69%, 65.5%, 0%, 34.1%)
CIE-LAB	lab(30.84, 34.12, -59.79)
CIE-LCH	lch(30.84, 68.84, 299.71°)
OKLab	oklab(41.77% 0.0112 -0.1726)
OKLCH	oklch(41.77% 0.173 273.7)
XYZ	xyz(9.9948, 6.5824, 37.7820)
Luminance	0.0658 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.15

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343AA8 #A8A234

analogous

#3474A8 #343AA8 #6834A8

triadic

#343AA8 #A8343A #3AA834

tetradic

#343AA8 #A83474 #A8A234 #34A868

square

#343AA8 #A83474 #A8A234 #34A868

split-complementary

#343AA8 #A86834 #74A834

monochromatic

#171A4B #262A79 #343AA8 #5057C9 #7F84D7

Accessibility & contrast

On white

9.07

#343AA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#343AA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343AA8

9.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343AA8	#FFFFFF	#000000	##FFFFFF
##343AA8	1.00	9.07	2.32	9.07
#FFFFFF	9.07	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EAB

Deuteranopia (green-blind)

#0043A6

Tritanopia (blue-blind)

#00576B

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #343aa8;
/* rgb */ color: rgb(52, 58, 168);
/* oklch */ color: oklch(41.8% 0.173 273.7);

Tailwind

colors: {
  custom: {
    50: '#7b70c3',
    500: '#343aa8',
    950: '#000000',
  },
}

SCSS

$custom: #343aa8;
$custom-light: #7b70c3;
$custom-dark: #000000;

JSON

{
  "hex": "#343aa8",
  "rgb": {
    "r": 52,
    "g": 58,
    "b": 168
  },
  "hsl": {
    "h": 236.897,
    "s": 52.727,
    "l": 43.137
  },
  "oklch": {
    "l": 0.41766,
    "c": 0.17297,
    "h": 273.7
  },
  "luminance": 0.06583
}

Semantic roles & 50–950 ramp

primary

#343AA8

secondary

#C0BD77

accent

#D54CDC

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #343AA8

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

Preview Lab → · Contrast checker → · Palette generator →