#343FB1#343FB1

#343FB1 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.5% C 0.179 H 272.2°. Best body text is #FFFFFF at 8.43:1 contrast (WCAG AA passes).

Color values

HEX	#343FB1
RGB	rgb(52, 63, 177)
HSL	hsl(235, 55%, 45%)
HSV	hsv(235, 71%, 69%)
CMYK	cmyk(70.6%, 64.4%, 0%, 30.6%)
CIE-LAB	lab(32.83, 34.13, -61.91)
CIE-LCH	lch(32.83, 70.69, 298.87°)
OKLab	oklab(43.47% 0.0069 -0.1788)
OKLCH	oklch(43.47% 0.179 272.2)
XYZ	xyz(11.1268, 7.4583, 42.4397)
Luminance	0.0746 (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

#343FB1 #B1A634

analogous

#347EB1 #343FB1 #6834B1

triadic

#343FB1 #B1343F #3FB134

tetradic

#343FB1 #B1347E #B1A634 #34B168

square

#343FB1 #B1347E #B1A634 #34B168

split-complementary

#343FB1 #B16834 #7EB134

monochromatic

#181D52 #262E82 #343FB1 #5560CD #848CDB

Accessibility & contrast

On white

8.43

#343FB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#343FB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343FB1

8.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343FB1	#FFFFFF	#000000	##FFFFFF
##343FB1	1.00	8.43	2.49	8.43
#FFFFFF	8.43	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B5

Deuteranopia (green-blind)

#0047AF

Tritanopia (blue-blind)

#005D72

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #343fb1;
/* rgb */ color: rgb(52, 63, 177);
/* oklch */ color: oklch(43.5% 0.179 272.2);

Tailwind

colors: {
  custom: {
    50: '#7d74c9',
    500: '#343fb1',
    950: '#000000',
  },
}

SCSS

$custom: #343fb1;
$custom-light: #7d74c9;
$custom-dark: #000000;

JSON

{
  "hex": "#343fb1",
  "rgb": {
    "r": 52,
    "g": 63,
    "b": 177
  },
  "hsl": {
    "h": 234.72,
    "s": 54.585,
    "l": 44.902
  },
  "oklch": {
    "l": 0.43466,
    "c": 0.17892,
    "h": 272.2
  },
  "luminance": 0.07459
}

Semantic roles & 50–950 ramp

primary

#343FB1

secondary

#C5BE7C

accent

#D14ADE

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #343FB1

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

Preview Lab → · Contrast checker → · Palette generator →