#343FA6#343FA6

#343FA6 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.5% C 0.164 H 272.6°. Best body text is #FFFFFF at 8.72:1 contrast (WCAG AA passes).

Color values

HEX	#343FA6
RGB	rgb(52, 63, 166)
HSL	hsl(234, 52%, 43%)
HSV	hsv(234, 69%, 65%)
CMYK	cmyk(68.7%, 62%, 0%, 34.9%)
CIE-LAB	lab(31.89, 30.20, -56.86)
CIE-LCH	lch(31.89, 64.38, 297.97°)
OKLab	oklab(42.49% 0.0074 -0.164)
OKLCH	oklch(42.49% 0.164 272.6)
XYZ	xyz(10.0743, 7.0373, 36.8964)
Luminance	0.0704 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343FA6 #A69B34

analogous

#3478A6 #343FA6 #6234A6

triadic

#343FA6 #A6343F #3FA634

tetradic

#343FA6 #A63478 #A69B34 #34A662

square

#343FA6 #A63478 #A69B34 #34A662

split-complementary

#343FA6 #A66234 #78A634

monochromatic

#171C49 #252D77 #343FA6 #4F5BC8 #7E86D7

Accessibility & contrast

On white

8.72

#343FA6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#343FA6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343FA6

8.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343FA6	#FFFFFF	#000000	##FFFFFF
##343FA6	1.00	8.72	2.41	8.72
#FFFFFF	8.72	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A9

Deuteranopia (green-blind)

#0046A4

Tritanopia (blue-blind)

#00596C

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #343fa6;
/* rgb */ color: rgb(52, 63, 166);
/* oklch */ color: oklch(42.5% 0.164 272.6);

Tailwind

colors: {
  custom: {
    50: '#7a74c1',
    500: '#343fa6',
    950: '#000000',
  },
}

SCSS

$custom: #343fa6;
$custom-light: #7a74c1;
$custom-dark: #000000;

JSON

{
  "hex": "#343fa6",
  "rgb": {
    "r": 52,
    "g": 63,
    "b": 166
  },
  "hsl": {
    "h": 234.211,
    "s": 52.294,
    "l": 42.745
  },
  "oklch": {
    "l": 0.42487,
    "c": 0.16416,
    "h": 272.6
  },
  "luminance": 0.07038
}

Semantic roles & 50–950 ramp

primary

#343FA6

secondary

#C0B876

accent

#CE4CDC

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #343FA6

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

Preview Lab → · Contrast checker → · Palette generator →