#343FA4#343FA4

#343FA4 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.3% C 0.161 H 272.7°. Best body text is #FFFFFF at 8.78:1 contrast (WCAG AA passes).

Color values

HEX	#343FA4
RGB	rgb(52, 63, 164)
HSL	hsl(234, 52%, 42%)
HSV	hsv(234, 68%, 64%)
CMYK	cmyk(68.3%, 61.6%, 0%, 35.7%)
CIE-LAB	lab(31.73, 29.48, -55.93)
CIE-LCH	lch(31.73, 63.22, 297.79°)
OKLab	oklab(42.31% 0.0075 -0.1612)
OKLCH	oklch(42.31% 0.161 272.7)
XYZ	xyz(9.8923, 6.9645, 35.9377)
Luminance	0.0697 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343FA4 #A49934

analogous

#3477A4 #343FA4 #6134A4

triadic

#343FA4 #A4343F #3FA434

tetradic

#343FA4 #A43477 #A49934 #34A461

square

#343FA4 #A43477 #A49934 #34A461

split-complementary

#343FA4 #A46134 #77A434

monochromatic

#171B47 #252D76 #343FA4 #4E5AC7 #7D85D6

Accessibility & contrast

On white

8.78

#343FA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#343FA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343FA4

8.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343FA4	#FFFFFF	#000000	##FFFFFF
##343FA4	1.00	8.78	2.39	8.78
#FFFFFF	8.78	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A7

Deuteranopia (green-blind)

#0046A2

Tritanopia (blue-blind)

#00586B

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #343fa4;
/* rgb */ color: rgb(52, 63, 164);
/* oklch */ color: oklch(42.3% 0.161 272.7);

Tailwind

colors: {
  custom: {
    50: '#7a74c0',
    500: '#343fa4',
    950: '#000000',
  },
}

SCSS

$custom: #343fa4;
$custom-light: #7a74c0;
$custom-dark: #000000;

JSON

{
  "hex": "#343fa4",
  "rgb": {
    "r": 52,
    "g": 63,
    "b": 164
  },
  "hsl": {
    "h": 234.107,
    "s": 51.852,
    "l": 42.353
  },
  "oklch": {
    "l": 0.42313,
    "c": 0.16142,
    "h": 272.7
  },
  "luminance": 0.06965
}

Semantic roles & 50–950 ramp

primary

#343FA4

secondary

#BFB775

accent

#CD4CDB

background

#F7F7FB

surface

#EEEDF7

border

#C9C8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #343FA4

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

Preview Lab → · Contrast checker → · Palette generator →