#343BB1#343BB1

#343BB1 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.8% C 0.184 H 273.0°. Best body text is #FFFFFF at 8.73:1 contrast (WCAG AA passes).

Color values

HEX	#343BB1
RGB	rgb(52, 59, 177)
HSL	hsl(237, 55%, 45%)
HSV	hsv(237, 71%, 69%)
CMYK	cmyk(70.6%, 66.7%, 0%, 30.6%)
CIE-LAB	lab(31.88, 36.65, -63.46)
CIE-LCH	lch(31.88, 73.29, 300.01°)
OKLab	oklab(42.77% 0.0097 -0.1834)
OKLCH	oklch(42.77% 0.184 273)
XYZ	xyz(10.9133, 7.0313, 42.3685)
Luminance	0.0703 (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

#343BB1 #B1AA34

analogous

#347AB1 #343BB1 #6C34B1

triadic

#343BB1 #B1343B #3BB134

tetradic

#343BB1 #B1347A #B1AA34 #34B16C

square

#343BB1 #B1347A #B1AA34 #34B16C

split-complementary

#343BB1 #B16C34 #7AB134

monochromatic

#181B52 #262B82 #343BB1 #555CCD #8489DB

Accessibility & contrast

On white

8.73

#343BB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#343BB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343BB1

8.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343BB1	#FFFFFF	#000000	##FFFFFF
##343BB1	1.00	8.73	2.41	8.73
#FFFFFF	8.73	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B5

Deuteranopia (green-blind)

#0045AF

Tritanopia (blue-blind)

#005A71

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #343bb1;
/* rgb */ color: rgb(52, 59, 177);
/* oklch */ color: oklch(42.8% 0.184 273.0);

Tailwind

colors: {
  custom: {
    50: '#7d71c9',
    500: '#343bb1',
    950: '#000000',
  },
}

SCSS

$custom: #343bb1;
$custom-light: #7d71c9;
$custom-dark: #000000;

JSON

{
  "hex": "#343bb1",
  "rgb": {
    "r": 52,
    "g": 59,
    "b": 177
  },
  "hsl": {
    "h": 236.64,
    "s": 54.585,
    "l": 44.902
  },
  "oklch": {
    "l": 0.42772,
    "c": 0.18363,
    "h": 273
  },
  "luminance": 0.07032
}

Semantic roles & 50–950 ramp

primary

#343BB1

secondary

#C5C07C

accent

#D64ADE

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #343BB1

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

Preview Lab → · Contrast checker → · Palette generator →