#343EA8#343EA8

#343EA8 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.5% C 0.168 H 272.8°. Best body text is #FFFFFF at 8.75:1 contrast (WCAG AA passes).

Color values

HEX	#343EA8
RGB	rgb(52, 62, 168)
HSL	hsl(235, 53%, 43%)
HSV	hsv(235, 69%, 66%)
CMYK	cmyk(69%, 63.1%, 0%, 34.1%)
CIE-LAB	lab(31.81, 31.56, -58.20)
CIE-LCH	lch(31.81, 66.20, 298.47°)
OKLab	oklab(42.48% 0.0081 -0.1679)
OKLCH	oklch(42.48% 0.168 272.8)
XYZ	xyz(10.2043, 7.0015, 37.8519)
Luminance	0.0700 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343EA8 #A89E34

analogous

#3478A8 #343EA8 #6434A8

triadic

#343EA8 #A8343E #3EA834

tetradic

#343EA8 #A83478 #A89E34 #34A864

square

#343EA8 #A83478 #A89E34 #34A864

split-complementary

#343EA8 #A86434 #78A834

monochromatic

#171C4B #262D79 #343EA8 #505BC9 #7F87D7

Accessibility & contrast

On white

8.75

#343EA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#343EA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343EA8

8.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343EA8	#FFFFFF	#000000	##FFFFFF
##343EA8	1.00	8.75	2.40	8.75
#FFFFFF	8.75	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050AB

Deuteranopia (green-blind)

#0046A6

Tritanopia (blue-blind)

#00596D

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #343ea8;
/* rgb */ color: rgb(52, 62, 168);
/* oklch */ color: oklch(42.5% 0.168 272.8);

Tailwind

colors: {
  custom: {
    50: '#7b73c3',
    500: '#343ea8',
    950: '#000000',
  },
}

SCSS

$custom: #343ea8;
$custom-light: #7b73c3;
$custom-dark: #000000;

JSON

{
  "hex": "#343ea8",
  "rgb": {
    "r": 52,
    "g": 62,
    "b": 168
  },
  "hsl": {
    "h": 234.828,
    "s": 52.727,
    "l": 43.137
  },
  "oklch": {
    "l": 0.4248,
    "c": 0.16811,
    "h": 272.8
  },
  "luminance": 0.07002
}

Semantic roles & 50–950 ramp

primary

#343EA8

secondary

#C0BA77

accent

#D04CDC

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #343EA8

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

Preview Lab → · Contrast checker → · Palette generator →