#343FB9#343FB9

#343FB9 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.2% C 0.189 H 271.9°. Best body text is #FFFFFF at 8.21:1 contrast (WCAG AA passes).

Color values

HEX	#343FB9
RGB	rgb(52, 63, 185)
HSL	hsl(235, 56%, 46%)
HSV	hsv(235, 72%, 73%)
CMYK	cmyk(71.9%, 65.9%, 0%, 27.5%)
CIE-LAB	lab(33.53, 36.96, -65.49)
CIE-LCH	lch(33.53, 75.20, 299.44°)
OKLab	oklab(44.2% 0.0063 -0.1893)
OKLCH	oklch(44.2% 0.189 271.9)
XYZ	xyz(11.9477, 7.7867, 46.7629)
Luminance	0.0779 (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

#343FB9 #B9AE34

analogous

#3482B9 #343FB9 #6C34B9

triadic

#343FB9 #B9343F #3FB934

tetradic

#343FB9 #B93482 #B9AE34 #34B96C

square

#343FB9 #B93482 #B9AE34 #34B96C

split-complementary

#343FB9 #B96C34 #82B934

monochromatic

#191E59 #272F89 #343FB9 #5A64D1 #8990DE

Accessibility & contrast

On white

8.21

#343FB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#343FB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343FB9

8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343FB9	#FFFFFF	#000000	##FFFFFF
##343FB9	1.00	8.21	2.56	8.21
#FFFFFF	8.21	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BD

Deuteranopia (green-blind)

#0049B7

Tritanopia (blue-blind)

#005F76

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #343fb9;
/* rgb */ color: rgb(52, 63, 185);
/* oklch */ color: oklch(44.2% 0.189 271.9);

Tailwind

colors: {
  custom: {
    50: '#7e74cf',
    500: '#343fb9',
    950: '#000000',
  },
}

SCSS

$custom: #343fb9;
$custom-light: #7e74cf;
$custom-dark: #000000;

JSON

{
  "hex": "#343fb9",
  "rgb": {
    "r": 52,
    "g": 63,
    "b": 185
  },
  "hsl": {
    "h": 235.038,
    "s": 56.118,
    "l": 46.471
  },
  "oklch": {
    "l": 0.442,
    "c": 0.18939,
    "h": 271.9
  },
  "luminance": 0.07788
}

Semantic roles & 50–950 ramp

primary

#343FB9

secondary

#C8C281

accent

#D348DF

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #343FB9

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

Preview Lab → · Contrast checker → · Palette generator →