#343AB1#343AB1

#343AB1 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.6% C 0.185 H 273.2°. Best body text is #FFFFFF at 8.80:1 contrast (WCAG AA passes).

Color values

HEX	#343AB1
RGB	rgb(52, 58, 177)
HSL	hsl(237, 55%, 45%)
HSV	hsv(237, 71%, 69%)
CMYK	cmyk(70.6%, 67.2%, 0%, 30.6%)
CIE-LAB	lab(31.65, 37.27, -63.85)
CIE-LCH	lch(31.65, 73.93, 300.28°)
OKLab	oklab(42.6% 0.0104 -0.1845)
OKLCH	oklch(42.6% 0.185 273.2)
XYZ	xyz(10.8624, 6.9295, 42.3515)
Luminance	0.0693 (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

#343AB1 #B1AB34

analogous

#3479B1 #343AB1 #6D34B1

triadic

#343AB1 #B1343A #3AB134

tetradic

#343AB1 #B13479 #B1AB34 #34B16D

square

#343AB1 #B13479 #B1AB34 #34B16D

split-complementary

#343AB1 #B16D34 #79B134

monochromatic

#181B52 #262A82 #343AB1 #555BCD #8489DB

Accessibility & contrast

On white

8.80

#343AB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#343AB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343AB1

8.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343AB1	#FFFFFF	#000000	##FFFFFF
##343AB1	1.00	8.80	2.39	8.80
#FFFFFF	8.80	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B5

Deuteranopia (green-blind)

#0045AF

Tritanopia (blue-blind)

#005A70

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #343ab1;
/* rgb */ color: rgb(52, 58, 177);
/* oklch */ color: oklch(42.6% 0.185 273.2);

Tailwind

colors: {
  custom: {
    50: '#7d70c9',
    500: '#343ab1',
    950: '#000000',
  },
}

SCSS

$custom: #343ab1;
$custom-light: #7d70c9;
$custom-dark: #000000;

JSON

{
  "hex": "#343ab1",
  "rgb": {
    "r": 52,
    "g": 58,
    "b": 177
  },
  "hsl": {
    "h": 237.12,
    "s": 54.585,
    "l": 44.902
  },
  "oklch": {
    "l": 0.42604,
    "c": 0.18478,
    "h": 273.2
  },
  "luminance": 0.06931
}

Semantic roles & 50–950 ramp

primary

#343AB1

secondary

#C5C17C

accent

#D74ADE

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #343AB1

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

Preview Lab → · Contrast checker → · Palette generator →