#343BB0#343BB0

#343BB0 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.7% C 0.182 H 273.1°. Best body text is #FFFFFF at 8.76:1 contrast (WCAG AA passes).

Color values

HEX	#343BB0
RGB	rgb(52, 59, 176)
HSL	hsl(237, 54%, 45%)
HSV	hsv(237, 70%, 69%)
CMYK	cmyk(70.5%, 66.5%, 0%, 31%)
CIE-LAB	lab(31.79, 36.30, -63.02)
CIE-LCH	lch(31.79, 72.72, 299.94°)
OKLab	oklab(42.68% 0.0098 -0.1821)
OKLCH	oklch(42.68% 0.182 273.1)
XYZ	xyz(10.8140, 6.9915, 41.8455)
Luminance	0.0699 (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

#343BB0 #B0A934

analogous

#3479B0 #343BB0 #6B34B0

triadic

#343BB0 #B0343B #3BB034

tetradic

#343BB0 #B03479 #B0A934 #34B06B

square

#343BB0 #B03479 #B0A934 #34B06B

split-complementary

#343BB0 #B06B34 #79B034

monochromatic

#181B52 #262B81 #343BB0 #555BCD #8489DB

Accessibility & contrast

On white

8.76

#343BB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#343BB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343BB0

8.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343BB0	#FFFFFF	#000000	##FFFFFF
##343BB0	1.00	8.76	2.40	8.76
#FFFFFF	8.76	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B4

Deuteranopia (green-blind)

#0045AE

Tritanopia (blue-blind)

#005A70

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #343bb0;
/* rgb */ color: rgb(52, 59, 176);
/* oklch */ color: oklch(42.7% 0.182 273.1);

Tailwind

colors: {
  custom: {
    50: '#7d71c9',
    500: '#343bb0',
    950: '#000000',
  },
}

SCSS

$custom: #343bb0;
$custom-light: #7d71c9;
$custom-dark: #000000;

JSON

{
  "hex": "#343bb0",
  "rgb": {
    "r": 52,
    "g": 59,
    "b": 176
  },
  "hsl": {
    "h": 236.613,
    "s": 54.386,
    "l": 44.706
  },
  "oklch": {
    "l": 0.42679,
    "c": 0.18232,
    "h": 273.1
  },
  "luminance": 0.06993
}

Semantic roles & 50–950 ramp

primary

#343BB0

secondary

#C4C07C

accent

#D54ADE

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #343BB0

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

Preview Lab → · Contrast checker → · Palette generator →