#343DB4#343DB4

#343DB4 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.4% C 0.185 H 272.5°. Best body text is #FFFFFF at 8.49:1 contrast (WCAG AA passes).

Color values

HEX	#343DB4
RGB	rgb(52, 61, 180)
HSL	hsl(236, 55%, 45%)
HSV	hsv(236, 71%, 71%)
CMYK	cmyk(71.1%, 66.1%, 0%, 29.4%)
CIE-LAB	lab(32.62, 36.45, -64.04)
CIE-LCH	lch(32.62, 73.68, 299.65°)
OKLab	oklab(43.39% 0.0081 -0.185)
OKLCH	oklch(43.39% 0.185 272.5)
XYZ	xyz(11.3204, 7.3617, 43.9955)
Luminance	0.0736 (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

#343DB4 #B4AB34

analogous

#347DB4 #343DB4 #6B34B4

triadic

#343DB4 #B4343D #3DB434

tetradic

#343DB4 #B4347D #B4AB34 #34B46B

square

#343DB4 #B4347D #B4AB34 #34B46B

split-complementary

#343DB4 #B46B34 #7DB434

monochromatic

#191D55 #262D85 #343DB4 #575FCE #868CDC

Accessibility & contrast

On white

8.49

#343DB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#343DB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343DB4

8.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343DB4	#FFFFFF	#000000	##FFFFFF
##343DB4	1.00	8.49	2.47	8.49
#FFFFFF	8.49	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B8

Deuteranopia (green-blind)

#0047B2

Tritanopia (blue-blind)

#005C73

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #343db4;
/* rgb */ color: rgb(52, 61, 180);
/* oklch */ color: oklch(43.4% 0.185 272.5);

Tailwind

colors: {
  custom: {
    50: '#7d73cb',
    500: '#343db4',
    950: '#000000',
  },
}

SCSS

$custom: #343db4;
$custom-light: #7d73cb;
$custom-dark: #000000;

JSON

{
  "hex": "#343db4",
  "rgb": {
    "r": 52,
    "g": 61,
    "b": 180
  },
  "hsl": {
    "h": 235.781,
    "s": 55.172,
    "l": 45.49
  },
  "oklch": {
    "l": 0.43393,
    "c": 0.18522,
    "h": 272.5
  },
  "luminance": 0.07363
}

Semantic roles & 50–950 ramp

primary

#343DB4

secondary

#C6C17E

accent

#D449DF

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #343DB4

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

Preview Lab → · Contrast checker → · Palette generator →