#343FB3#343FB3

#343FB3 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.6% C 0.182 H 272.1°. Best body text is #FFFFFF at 8.37:1 contrast (WCAG AA passes).

Color values

HEX	#343FB3
RGB	rgb(52, 63, 179)
HSL	hsl(235, 55%, 45%)
HSV	hsv(235, 71%, 70%)
CMYK	cmyk(70.9%, 64.8%, 0%, 29.8%)
CIE-LAB	lab(33.00, 34.84, -62.81)
CIE-LCH	lch(33.00, 71.83, 299.02°)
OKLab	oklab(43.65% 0.0068 -0.1814)
OKLCH	oklch(43.65% 0.182 272.1)
XYZ	xyz(11.3276, 7.5386, 43.4972)
Luminance	0.0754 (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

#343FB3 #B3A834

analogous

#347EB3 #343FB3 #6834B3

triadic

#343FB3 #B3343F #3FB334

tetradic

#343FB3 #B3347E #B3A834 #34B368

square

#343FB3 #B3347E #B3A834 #34B368

split-complementary

#343FB3 #B36834 #7EB334

monochromatic

#181E54 #262E84 #343FB3 #5661CE #868DDC

Accessibility & contrast

On white

8.37

#343FB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#343FB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343FB3

8.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343FB3	#FFFFFF	#000000	##FFFFFF
##343FB3	1.00	8.37	2.51	8.37
#FFFFFF	8.37	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B7

Deuteranopia (green-blind)

#0048B1

Tritanopia (blue-blind)

#005D73

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #343fb3;
/* rgb */ color: rgb(52, 63, 179);
/* oklch */ color: oklch(43.6% 0.182 272.1);

Tailwind

colors: {
  custom: {
    50: '#7d74cb',
    500: '#343fb3',
    950: '#000000',
  },
}

SCSS

$custom: #343fb3;
$custom-light: #7d74cb;
$custom-dark: #000000;

JSON

{
  "hex": "#343fb3",
  "rgb": {
    "r": 52,
    "g": 63,
    "b": 179
  },
  "hsl": {
    "h": 234.803,
    "s": 54.978,
    "l": 45.294
  },
  "oklch": {
    "l": 0.43648,
    "c": 0.18156,
    "h": 272.1
  },
  "luminance": 0.0754
}

Semantic roles & 50–950 ramp

primary

#343FB3

secondary

#C5BF7D

accent

#D149DE

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #343FB3

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

Preview Lab → · Contrast checker → · Palette generator →