#343FB5#343FB5

#343FB5 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.8% C 0.184 H 272.1°. Best body text is #FFFFFF at 8.32:1 contrast (WCAG AA passes).

Color values

HEX	#343FB5
RGB	rgb(52, 63, 181)
HSL	hsl(235, 55%, 46%)
HSV	hsv(235, 71%, 71%)
CMYK	cmyk(71.3%, 65.2%, 0%, 29%)
CIE-LAB	lab(33.18, 35.55, -63.71)
CIE-LCH	lch(33.18, 72.95, 299.16°)
OKLab	oklab(43.83% 0.0066 -0.1841)
OKLCH	oklch(43.83% 0.184 272.1)
XYZ	xyz(11.5314, 7.6201, 44.5702)
Luminance	0.0762 (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

#343FB5 #B5AA34

analogous

#347FB5 #343FB5 #6934B5

triadic

#343FB5 #B5343F #3FB534

tetradic

#343FB5 #B5347F #B5AA34 #34B569

square

#343FB5 #B5347F #B5AA34 #34B569

split-complementary

#343FB5 #B56934 #7FB534

monochromatic

#191E56 #262E85 #343FB5 #5762CF #878EDC

Accessibility & contrast

On white

8.32

#343FB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#343FB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343FB5

8.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343FB5	#FFFFFF	#000000	##FFFFFF
##343FB5	1.00	8.32	2.52	8.32
#FFFFFF	8.32	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B9

Deuteranopia (green-blind)

#0048B3

Tritanopia (blue-blind)

#005E74

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #343fb5;
/* rgb */ color: rgb(52, 63, 181);
/* oklch */ color: oklch(43.8% 0.184 272.1);

Tailwind

colors: {
  custom: {
    50: '#7d74cc',
    500: '#343fb5',
    950: '#000000',
  },
}

SCSS

$custom: #343fb5;
$custom-light: #7d74cc;
$custom-dark: #000000;

JSON

{
  "hex": "#343fb5",
  "rgb": {
    "r": 52,
    "g": 63,
    "b": 181
  },
  "hsl": {
    "h": 234.884,
    "s": 55.365,
    "l": 45.686
  },
  "oklch": {
    "l": 0.43831,
    "c": 0.18418,
    "h": 272.1
  },
  "luminance": 0.07621
}

Semantic roles & 50–950 ramp

primary

#343FB5

secondary

#C6C07F

accent

#D249DF

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #343FB5

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

Preview Lab → · Contrast checker → · Palette generator →