#343FA7#343FA7

#343FA7 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.6% C 0.166 H 272.6°. Best body text is #FFFFFF at 8.70:1 contrast (WCAG AA passes).

Color values

HEX	#343FA7
RGB	rgb(52, 63, 167)
HSL	hsl(234, 53%, 43%)
HSV	hsv(234, 69%, 65%)
CMYK	cmyk(68.9%, 62.3%, 0%, 34.5%)
CIE-LAB	lab(31.98, 30.56, -57.33)
CIE-LCH	lch(31.98, 64.96, 298.06°)
OKLab	oklab(42.58% 0.0074 -0.1653)
OKLCH	oklch(42.58% 0.166 272.6)
XYZ	xyz(10.1664, 7.0741, 37.3814)
Luminance	0.0707 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343FA7 #A79C34

analogous

#3478A7 #343FA7 #6234A7

triadic

#343FA7 #A7343F #3FA734

tetradic

#343FA7 #A73478 #A79C34 #34A762

square

#343FA7 #A73478 #A79C34 #34A762

split-complementary

#343FA7 #A76234 #78A734

monochromatic

#171C4A #252D78 #343FA7 #505BC8 #7E87D7

Accessibility & contrast

On white

8.70

#343FA7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#343FA7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343FA7

8.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343FA7	#FFFFFF	#000000	##FFFFFF
##343FA7	1.00	8.70	2.41	8.70
#FFFFFF	8.70	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051AA

Deuteranopia (green-blind)

#0046A5

Tritanopia (blue-blind)

#00596D

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #343fa7;
/* rgb */ color: rgb(52, 63, 167);
/* oklch */ color: oklch(42.6% 0.166 272.6);

Tailwind

colors: {
  custom: {
    50: '#7a74c2',
    500: '#343fa7',
    950: '#000000',
  },
}

SCSS

$custom: #343fa7;
$custom-light: #7a74c2;
$custom-dark: #000000;

JSON

{
  "hex": "#343fa7",
  "rgb": {
    "r": 52,
    "g": 63,
    "b": 167
  },
  "hsl": {
    "h": 234.261,
    "s": 52.511,
    "l": 42.941
  },
  "oklch": {
    "l": 0.42575,
    "c": 0.16552,
    "h": 272.6
  },
  "luminance": 0.07075
}

Semantic roles & 50–950 ramp

primary

#343FA7

secondary

#C0B977

accent

#CE4CDC

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #343FA7

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

Preview Lab → · Contrast checker → · Palette generator →