#343FBA#343FBA

#343FBA is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.3% C 0.191 H 271.9°. Best body text is #FFFFFF at 8.18:1 contrast (WCAG AA passes).

Color values

HEX	#343FBA
RGB	rgb(52, 63, 186)
HSL	hsl(235, 56%, 47%)
HSV	hsv(235, 72%, 73%)
CMYK	cmyk(72%, 66.1%, 0%, 27.1%)
CIE-LAB	lab(33.62, 37.31, -65.93)
CIE-LCH	lch(33.62, 75.76, 299.50°)
OKLab	oklab(44.29% 0.0063 -0.1906)
OKLCH	oklch(44.29% 0.191 271.9)
XYZ	xyz(12.0536, 7.8290, 47.3208)
Luminance	0.0783 (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

#343FBA #BAAF34

analogous

#3482BA #343FBA #6C34BA

triadic

#343FBA #BA343F #3FBA34

tetradic

#343FBA #BA3482 #BAAF34 #34BA6C

square

#343FBA #BA3482 #BAAF34 #34BA6C

split-complementary

#343FBA #BA6C34 #82BA34

monochromatic

#191F5A #272F8A #343FBA #5A64D1 #8A91DE

Accessibility & contrast

On white

8.18

#343FBA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#343FBA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343FBA

8.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343FBA	#FFFFFF	#000000	##FFFFFF
##343FBA	1.00	8.18	2.57	8.18
#FFFFFF	8.18	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BE

Deuteranopia (green-blind)

#0049B8

Tritanopia (blue-blind)

#006077

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #343fba;
/* rgb */ color: rgb(52, 63, 186);
/* oklch */ color: oklch(44.3% 0.191 271.9);

Tailwind

colors: {
  custom: {
    50: '#7f74d0',
    500: '#343fba',
    950: '#000000',
  },
}

SCSS

$custom: #343fba;
$custom-light: #7f74d0;
$custom-dark: #000000;

JSON

{
  "hex": "#343fba",
  "rgb": {
    "r": 52,
    "g": 63,
    "b": 186
  },
  "hsl": {
    "h": 235.075,
    "s": 56.303,
    "l": 46.667
  },
  "oklch": {
    "l": 0.44293,
    "c": 0.19068,
    "h": 271.9
  },
  "luminance": 0.0783
}

Semantic roles & 50–950 ramp

primary

#343FBA

secondary

#C8C381

accent

#D348E0

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #343FBA

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

Preview Lab → · Contrast checker → · Palette generator →