#343AA6#343AA6

#343AA6 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.6% C 0.170 H 273.8°. Best body text is #FFFFFF at 9.12:1 contrast (WCAG AA passes).

Color values

HEX	#343AA6
RGB	rgb(52, 58, 166)
HSL	hsl(237, 52%, 43%)
HSV	hsv(237, 69%, 65%)
CMYK	cmyk(68.7%, 65.1%, 0%, 34.9%)
CIE-LAB	lab(30.66, 33.41, -58.87)
CIE-LCH	lch(30.66, 67.70, 299.58°)
OKLab	oklab(41.58% 0.0113 -0.1699)
OKLCH	oklch(41.58% 0.17 273.8)
XYZ	xyz(9.8099, 6.5084, 36.8083)
Luminance	0.0651 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.39

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343AA6 #A6A034

analogous

#3473A6 #343AA6 #6734A6

triadic

#343AA6 #A6343A #3AA634

tetradic

#343AA6 #A63473 #A6A034 #34A667

square

#343AA6 #A63473 #A6A034 #34A667

split-complementary

#343AA6 #A66734 #73A634

monochromatic

#171949 #252A77 #343AA6 #4F56C8 #7E83D7

Accessibility & contrast

On white

9.12

#343AA6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#343AA6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343AA6

9.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343AA6	#FFFFFF	#000000	##FFFFFF
##343AA6	1.00	9.12	2.30	9.12
#FFFFFF	9.12	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA9

Deuteranopia (green-blind)

#0043A4

Tritanopia (blue-blind)

#00566A

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #343aa6;
/* rgb */ color: rgb(52, 58, 166);
/* oklch */ color: oklch(41.6% 0.170 273.8);

Tailwind

colors: {
  custom: {
    50: '#7b70c1',
    500: '#343aa6',
    950: '#000000',
  },
}

SCSS

$custom: #343aa6;
$custom-light: #7b70c1;
$custom-dark: #000000;

JSON

{
  "hex": "#343aa6",
  "rgb": {
    "r": 52,
    "g": 58,
    "b": 166
  },
  "hsl": {
    "h": 236.842,
    "s": 52.294,
    "l": 42.745
  },
  "oklch": {
    "l": 0.41583,
    "c": 0.17031,
    "h": 273.8
  },
  "luminance": 0.06509
}

Semantic roles & 50–950 ramp

primary

#343AA6

secondary

#C0BC76

accent

#D44CDC

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0712

muted

#7C7A81

Preview Lab

Preview with #343AA6

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

Preview Lab → · Contrast checker → · Palette generator →