#343AA5#343AA5

#343AA5 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.5% C 0.169 H 273.9°. Best body text is #FFFFFF at 9.15:1 contrast (WCAG AA passes).

Color values

HEX	#343AA5
RGB	rgb(52, 58, 165)
HSL	hsl(237, 52%, 43%)
HSV	hsv(237, 68%, 65%)
CMYK	cmyk(68.5%, 64.8%, 0%, 35.3%)
CIE-LAB	lab(30.57, 33.06, -58.42)
CIE-LCH	lch(30.57, 67.12, 299.51°)
OKLab	oklab(41.49% 0.0114 -0.1686)
OKLCH	oklch(41.49% 0.169 273.9)
XYZ	xyz(9.7185, 6.4719, 36.3271)
Luminance	0.0647 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.50

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343AA5 #A59F34

analogous

#3473A5 #343AA5 #6634A5

triadic

#343AA5 #A5343A #3AA534

tetradic

#343AA5 #A53473 #A59F34 #34A566

square

#343AA5 #A53473 #A59F34 #34A566

split-complementary

#343AA5 #A56634 #73A534

monochromatic

#171948 #252A76 #343AA5 #4F55C7 #7D82D6

Accessibility & contrast

On white

9.15

#343AA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#343AA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343AA5

9.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343AA5	#FFFFFF	#000000	##FFFFFF
##343AA5	1.00	9.15	2.29	9.15
#FFFFFF	9.15	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA8

Deuteranopia (green-blind)

#0043A3

Tritanopia (blue-blind)

#00566A

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #343aa5;
/* rgb */ color: rgb(52, 58, 165);
/* oklch */ color: oklch(41.5% 0.169 273.9);

Tailwind

colors: {
  custom: {
    50: '#7a70c1',
    500: '#343aa5',
    950: '#000000',
  },
}

SCSS

$custom: #343aa5;
$custom-light: #7a70c1;
$custom-dark: #000000;

JSON

{
  "hex": "#343aa5",
  "rgb": {
    "r": 52,
    "g": 58,
    "b": 165
  },
  "hsl": {
    "h": 236.814,
    "s": 52.074,
    "l": 42.549
  },
  "oklch": {
    "l": 0.41492,
    "c": 0.16896,
    "h": 273.9
  },
  "luminance": 0.06473
}

Semantic roles & 50–950 ramp

primary

#343AA5

secondary

#BFBB76

accent

#D44CDC

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #343AA5

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

Preview Lab → · Contrast checker → · Palette generator →