#343CB9#343CB9

#343CB9 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.7% C 0.193 H 272.5°. Best body text is #FFFFFF at 8.42:1 contrast (WCAG AA passes).

Color values

HEX	#343CB9
RGB	rgb(52, 60, 185)
HSL	hsl(236, 56%, 46%)
HSV	hsv(236, 72%, 73%)
CMYK	cmyk(71.9%, 67.6%, 0%, 27.5%)
CIE-LAB	lab(32.84, 38.82, -66.63)
CIE-LCH	lch(32.84, 77.11, 300.22°)
OKLab	oklab(43.69% 0.0083 -0.1926)
OKLCH	oklch(43.69% 0.193 272.5)
XYZ	xyz(11.7860, 7.4634, 46.7090)
Luminance	0.0746 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343CB9 #B9B134

analogous

#347FB9 #343CB9 #6F34B9

triadic

#343CB9 #B9343C #3CB934

tetradic

#343CB9 #B9347F #B9B134 #34B96F

square

#343CB9 #B9347F #B9B134 #34B96F

split-complementary

#343CB9 #B96F34 #7FB934

monochromatic

#191D59 #272D89 #343CB9 #5A61D1 #898FDE

Accessibility & contrast

On white

8.42

#343CB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#343CB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343CB9

8.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343CB9	#FFFFFF	#000000	##FFFFFF
##343CB9	1.00	8.42	2.49	8.42
#FFFFFF	8.42	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BD

Deuteranopia (green-blind)

#0047B7

Tritanopia (blue-blind)

#005E75

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #343cb9;
/* rgb */ color: rgb(52, 60, 185);
/* oklch */ color: oklch(43.7% 0.193 272.5);

Tailwind

colors: {
  custom: {
    50: '#7f72cf',
    500: '#343cb9',
    950: '#000000',
  },
}

SCSS

$custom: #343cb9;
$custom-light: #7f72cf;
$custom-dark: #000000;

JSON

{
  "hex": "#343cb9",
  "rgb": {
    "r": 52,
    "g": 60,
    "b": 185
  },
  "hsl": {
    "h": 236.391,
    "s": 56.118,
    "l": 46.471
  },
  "oklch": {
    "l": 0.43694,
    "c": 0.19281,
    "h": 272.5
  },
  "luminance": 0.07465
}

Semantic roles & 50–950 ramp

primary

#343CB9

secondary

#C8C481

accent

#D648DF

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #343CB9

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

Preview Lab → · Contrast checker → · Palette generator →