#343AB3#343AB3

#343AB3 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.8% C 0.187 H 273.1°. Best body text is #FFFFFF at 8.74:1 contrast (WCAG AA passes).

Color values

HEX	#343AB3
RGB	rgb(52, 58, 179)
HSL	hsl(237, 55%, 45%)
HSV	hsv(237, 71%, 70%)
CMYK	cmyk(70.9%, 67.6%, 0%, 29.8%)
CIE-LAB	lab(31.83, 37.97, -64.73)
CIE-LCH	lch(31.83, 75.05, 300.39°)
OKLab	oklab(42.79% 0.0101 -0.1871)
OKLCH	oklch(42.79% 0.187 273.1)
XYZ	xyz(11.0632, 7.0098, 43.4091)
Luminance	0.0701 (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

#343AB3 #B3AD34

analogous

#347AB3 #343AB3 #6D34B3

triadic

#343AB3 #B3343A #3AB334

tetradic

#343AB3 #B3347A #B3AD34 #34B36D

square

#343AB3 #B3347A #B3AD34 #34B36D

split-complementary

#343AB3 #B36D34 #7AB334

monochromatic

#181B54 #262B84 #343AB3 #565CCE #868ADC

Accessibility & contrast

On white

8.74

#343AB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#343AB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343AB3

8.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343AB3	#FFFFFF	#000000	##FFFFFF
##343AB3	1.00	8.74	2.40	8.74
#FFFFFF	8.74	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B7

Deuteranopia (green-blind)

#0045B1

Tritanopia (blue-blind)

#005A71

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #343ab3;
/* rgb */ color: rgb(52, 58, 179);
/* oklch */ color: oklch(42.8% 0.187 273.1);

Tailwind

colors: {
  custom: {
    50: '#7d71cb',
    500: '#343ab3',
    950: '#000000',
  },
}

SCSS

$custom: #343ab3;
$custom-light: #7d71cb;
$custom-dark: #000000;

JSON

{
  "hex": "#343ab3",
  "rgb": {
    "r": 52,
    "g": 58,
    "b": 179
  },
  "hsl": {
    "h": 237.165,
    "s": 54.978,
    "l": 45.294
  },
  "oklch": {
    "l": 0.42793,
    "c": 0.18736,
    "h": 273.1
  },
  "luminance": 0.07011
}

Semantic roles & 50–950 ramp

primary

#343AB3

secondary

#C5C27D

accent

#D749DE

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #343AB3

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

Preview Lab → · Contrast checker → · Palette generator →