#343AB4#343AB4

#343AB4 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.9% C 0.189 H 273.1°. Best body text is #FFFFFF at 8.71:1 contrast (WCAG AA passes).

Color values

HEX	#343AB4
RGB	rgb(52, 58, 180)
HSL	hsl(237, 55%, 45%)
HSV	hsv(237, 71%, 71%)
CMYK	cmyk(71.1%, 67.8%, 0%, 29.4%)
CIE-LAB	lab(31.92, 38.31, -65.18)
CIE-LCH	lch(31.92, 75.60, 300.45°)
OKLab	oklab(42.89% 0.01 -0.1884)
OKLCH	oklch(42.89% 0.189 273.1)
XYZ	xyz(11.1647, 7.0504, 43.9436)
Luminance	0.0705 (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

#343AB4 #B4AE34

analogous

#347AB4 #343AB4 #6E34B4

triadic

#343AB4 #B4343A #3AB434

tetradic

#343AB4 #B4347A #B4AE34 #34B46E

square

#343AB4 #B4347A #B4AE34 #34B46E

split-complementary

#343AB4 #B46E34 #7AB434

monochromatic

#191B55 #262B85 #343AB4 #575CCE #868ADC

Accessibility & contrast

On white

8.71

#343AB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#343AB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343AB4

8.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343AB4	#FFFFFF	#000000	##FFFFFF
##343AB4	1.00	8.71	2.41	8.71
#FFFFFF	8.71	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B8

Deuteranopia (green-blind)

#0045B2

Tritanopia (blue-blind)

#005B72

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #343ab4;
/* rgb */ color: rgb(52, 58, 180);
/* oklch */ color: oklch(42.9% 0.189 273.1);

Tailwind

colors: {
  custom: {
    50: '#7e71cc',
    500: '#343ab4',
    950: '#000000',
  },
}

SCSS

$custom: #343ab4;
$custom-light: #7e71cc;
$custom-dark: #000000;

JSON

{
  "hex": "#343ab4",
  "rgb": {
    "r": 52,
    "g": 58,
    "b": 180
  },
  "hsl": {
    "h": 237.188,
    "s": 55.172,
    "l": 45.49
  },
  "oklch": {
    "l": 0.42888,
    "c": 0.18865,
    "h": 273.1
  },
  "luminance": 0.07051
}

Semantic roles & 50–950 ramp

primary

#343AB4

secondary

#C6C27E

accent

#D849DF

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #343AB4

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

Preview Lab → · Contrast checker → · Palette generator →