#343FB8#343FB8

#343FB8 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.1% C 0.188 H 272.0°. Best body text is #FFFFFF at 8.24:1 contrast (WCAG AA passes).

Color values

HEX	#343FB8
RGB	rgb(52, 63, 184)
HSL	hsl(235, 56%, 46%)
HSV	hsv(235, 72%, 72%)
CMYK	cmyk(71.7%, 65.8%, 0%, 27.8%)
CIE-LAB	lab(33.45, 36.60, -65.05)
CIE-LCH	lch(33.45, 74.64, 299.37°)
OKLab	oklab(44.11% 0.0064 -0.188)
OKLCH	oklch(44.11% 0.188 272)
XYZ	xyz(11.8425, 7.7446, 46.2088)
Luminance	0.0775 (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

#343FB8 #B8AD34

analogous

#3481B8 #343FB8 #6B34B8

triadic

#343FB8 #B8343F #3FB834

tetradic

#343FB8 #B83481 #B8AD34 #34B86B

square

#343FB8 #B83481 #B8AD34 #34B86B

split-complementary

#343FB8 #B86B34 #81B834

monochromatic

#191E59 #272F88 #343FB8 #5963D0 #8990DE

Accessibility & contrast

On white

8.24

#343FB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#343FB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343FB8

8.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343FB8	#FFFFFF	#000000	##FFFFFF
##343FB8	1.00	8.24	2.55	8.24
#FFFFFF	8.24	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BC

Deuteranopia (green-blind)

#0049B6

Tritanopia (blue-blind)

#005F76

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #343fb8;
/* rgb */ color: rgb(52, 63, 184);
/* oklch */ color: oklch(44.1% 0.188 272.0);

Tailwind

colors: {
  custom: {
    50: '#7e74ce',
    500: '#343fb8',
    950: '#000000',
  },
}

SCSS

$custom: #343fb8;
$custom-light: #7e74ce;
$custom-dark: #000000;

JSON

{
  "hex": "#343fb8",
  "rgb": {
    "r": 52,
    "g": 63,
    "b": 184
  },
  "hsl": {
    "h": 235,
    "s": 55.932,
    "l": 46.275
  },
  "oklch": {
    "l": 0.44107,
    "c": 0.18809,
    "h": 272
  },
  "luminance": 0.07746
}

Semantic roles & 50–950 ramp

primary

#343FB8

secondary

#C8C280

accent

#D349DF

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #343FB8

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

Preview Lab → · Contrast checker → · Palette generator →