#343EA5#343EA5

#343EA5 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.2% C 0.164 H 272.9°. Best body text is #FFFFFF at 8.83:1 contrast (WCAG AA passes).

Color values

HEX	#343EA5
RGB	rgb(52, 62, 165)
HSL	hsl(235, 52%, 43%)
HSV	hsv(235, 68%, 65%)
CMYK	cmyk(68.5%, 62.4%, 0%, 35.3%)
CIE-LAB	lab(31.56, 30.49, -56.81)
CIE-LCH	lch(31.56, 64.47, 298.22°)
OKLab	oklab(42.22% 0.0083 -0.1638)
OKLCH	oklch(42.22% 0.164 272.9)
XYZ	xyz(9.9281, 6.8910, 36.3969)
Luminance	0.0689 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343EA5 #A59B34

analogous

#3477A5 #343EA5 #6234A5

triadic

#343EA5 #A5343E #3EA534

tetradic

#343EA5 #A53477 #A59B34 #34A562

square

#343EA5 #A53477 #A59B34 #34A562

split-complementary

#343EA5 #A56234 #77A534

monochromatic

#171B48 #252D76 #343EA5 #4F59C7 #7D85D6

Accessibility & contrast

On white

8.83

#343EA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#343EA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343EA5

8.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343EA5	#FFFFFF	#000000	##FFFFFF
##343EA5	1.00	8.83	2.38	8.83
#FFFFFF	8.83	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA8

Deuteranopia (green-blind)

#0045A3

Tritanopia (blue-blind)

#00586B

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #343ea5;
/* rgb */ color: rgb(52, 62, 165);
/* oklch */ color: oklch(42.2% 0.164 272.9);

Tailwind

colors: {
  custom: {
    50: '#7a73c1',
    500: '#343ea5',
    950: '#000000',
  },
}

SCSS

$custom: #343ea5;
$custom-light: #7a73c1;
$custom-dark: #000000;

JSON

{
  "hex": "#343ea5",
  "rgb": {
    "r": 52,
    "g": 62,
    "b": 165
  },
  "hsl": {
    "h": 234.69,
    "s": 52.074,
    "l": 42.549
  },
  "oklch": {
    "l": 0.42215,
    "c": 0.16405,
    "h": 272.9
  },
  "luminance": 0.06892
}

Semantic roles & 50–950 ramp

primary

#343EA5

secondary

#BFB976

accent

#CF4CDC

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #343EA5

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

Preview Lab → · Contrast checker → · Palette generator →