#343CB1#343CB1

#343CB1 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.9% C 0.182 H 272.8°. Best body text is #FFFFFF at 8.65:1 contrast (WCAG AA passes).

Color values

HEX	#343CB1
RGB	rgb(52, 60, 177)
HSL	hsl(236, 55%, 45%)
HSV	hsv(236, 71%, 69%)
CMYK	cmyk(70.6%, 66.1%, 0%, 30.6%)
CIE-LAB	lab(32.11, 36.02, -63.08)
CIE-LCH	lch(32.11, 72.64, 299.73°)
OKLab	oklab(42.94% 0.009 -0.1822)
OKLCH	oklch(42.94% 0.182 272.8)
XYZ	xyz(10.9652, 7.1350, 42.3858)
Luminance	0.0714 (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

#343CB1 #B1A934

analogous

#347BB1 #343CB1 #6B34B1

triadic

#343CB1 #B1343C #3CB134

tetradic

#343CB1 #B1347B #B1A934 #34B16B

square

#343CB1 #B1347B #B1A934 #34B16B

split-complementary

#343CB1 #B16B34 #7BB134

monochromatic

#181C52 #262C82 #343CB1 #555DCD #848ADB

Accessibility & contrast

On white

8.65

#343CB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#343CB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343CB1

8.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343CB1	#FFFFFF	#000000	##FFFFFF
##343CB1	1.00	8.65	2.43	8.65
#FFFFFF	8.65	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B5

Deuteranopia (green-blind)

#0046AF

Tritanopia (blue-blind)

#005B71

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #343cb1;
/* rgb */ color: rgb(52, 60, 177);
/* oklch */ color: oklch(42.9% 0.182 272.8);

Tailwind

colors: {
  custom: {
    50: '#7d72c9',
    500: '#343cb1',
    950: '#000000',
  },
}

SCSS

$custom: #343cb1;
$custom-light: #7d72c9;
$custom-dark: #000000;

JSON

{
  "hex": "#343cb1",
  "rgb": {
    "r": 52,
    "g": 60,
    "b": 177
  },
  "hsl": {
    "h": 236.16,
    "s": 54.585,
    "l": 44.902
  },
  "oklch": {
    "l": 0.42943,
    "c": 0.18246,
    "h": 272.8
  },
  "luminance": 0.07136
}

Semantic roles & 50–950 ramp

primary

#343CB1

secondary

#C5C07C

accent

#D44ADE

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #343CB1

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

Preview Lab → · Contrast checker → · Palette generator →