#343FAD#343FAD

#343FAD is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.1% C 0.174 H 272.4°. Best body text is #FFFFFF at 8.54:1 contrast (WCAG AA passes).

Color values

HEX	#343FAD
RGB	rgb(52, 63, 173)
HSL	hsl(235, 54%, 44%)
HSV	hsv(235, 70%, 68%)
CMYK	cmyk(69.9%, 63.6%, 0%, 32.2%)
CIE-LAB	lab(32.48, 32.70, -60.09)
CIE-LCH	lch(32.48, 68.41, 298.56°)
OKLab	oklab(43.11% 0.0071 -0.1735)
OKLCH	oklch(43.11% 0.174 272.4)
XYZ	xyz(10.7340, 7.3012, 40.3706)
Luminance	0.0730 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.93

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343FAD #ADA234

analogous

#347CAD #343FAD #6534AD

triadic

#343FAD #AD343F #3FAD34

tetradic

#343FAD #AD347C #ADA234 #34AD65

square

#343FAD #AD347C #ADA234 #34AD65

split-complementary

#343FAD #AD6534 #7CAD34

monochromatic

#181D4F #262E7E #343FAD #535ECB #828AD9

Accessibility & contrast

On white

8.54

#343FAD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#343FAD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343FAD

8.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343FAD	#FFFFFF	#000000	##FFFFFF
##343FAD	1.00	8.54	2.46	8.54
#FFFFFF	8.54	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B1

Deuteranopia (green-blind)

#0047AB

Tritanopia (blue-blind)

#005B70

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #343fad;
/* rgb */ color: rgb(52, 63, 173);
/* oklch */ color: oklch(43.1% 0.174 272.4);

Tailwind

colors: {
  custom: {
    50: '#7c74c6',
    500: '#343fad',
    950: '#000000',
  },
}

SCSS

$custom: #343fad;
$custom-light: #7c74c6;
$custom-dark: #000000;

JSON

{
  "hex": "#343fad",
  "rgb": {
    "r": 52,
    "g": 63,
    "b": 173
  },
  "hsl": {
    "h": 234.545,
    "s": 53.778,
    "l": 44.118
  },
  "oklch": {
    "l": 0.43106,
    "c": 0.17361,
    "h": 272.4
  },
  "luminance": 0.07302
}

Semantic roles & 50–950 ramp

primary

#343FAD

secondary

#C3BC7A

accent

#D04BDD

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #343FAD

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

Preview Lab → · Contrast checker → · Palette generator →