#343F8B#343F8B

#343F8B is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.3% C 0.126 H 273.2°. Best body text is #FFFFFF at 9.42:1 contrast (WCAG AA passes).

Color values

HEX	#343F8B
RGB	rgb(52, 63, 139)
HSL	hsl(232, 46%, 37%)
HSV	hsv(232, 63%, 55%)
CMYK	cmyk(62.6%, 54.7%, 0%, 45.5%)
CIE-LAB	lab(29.78, 20.42, -43.85)
CIE-LCH	lch(29.78, 48.37, 294.97°)
OKLab	oklab(40.26% 0.007 -0.1257)
OKLCH	oklch(40.26% 0.126 273.2)
XYZ	xyz(7.8523, 6.1485, 25.1941)
Luminance	0.0615 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343F8B #8B8034

analogous

#346A8B #343F8B #55348B

triadic

#343F8B #8B343F #3F8B34

tetradic

#343F8B #8B346A #8B8034 #348B55

square

#343F8B #8B346A #8B8034 #348B55

split-complementary

#343F8B #8B5534 #6A8B34

monochromatic

#131732 #232B5E #343F8B #4553B8 #707BC9

Accessibility & contrast

On white

9.42

#343F8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#343F8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343F8B

9.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343F8B	#FFFFFF	#000000	##FFFFFF
##343F8B	1.00	9.42	2.23	9.42
#FFFFFF	9.42	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F4A8E

Deuteranopia (green-blind)

#004289

Tritanopia (blue-blind)

#00515E

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #343f8b;
/* rgb */ color: rgb(52, 63, 139);
/* oklch */ color: oklch(40.3% 0.126 273.2);

Tailwind

colors: {
  custom: {
    50: '#7573ad',
    500: '#343f8b',
    950: '#000000',
  },
}

SCSS

$custom: #343f8b;
$custom-light: #7573ad;
$custom-dark: #000000;

JSON

{
  "hex": "#343f8b",
  "rgb": {
    "r": 52,
    "g": 63,
    "b": 139
  },
  "hsl": {
    "h": 232.414,
    "s": 45.55,
    "l": 37.451
  },
  "oklch": {
    "l": 0.40255,
    "c": 0.12592,
    "h": 273.2
  },
  "luminance": 0.06149
}

Semantic roles & 50–950 ramp

primary

#343F8B

secondary

#B2A869

accent

#C553D5

background

#F7F7FA

surface

#EDEDF4

border

#C8C8CE

text

#090810

muted

#7B7B7F

Preview Lab

Preview with #343F8B

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

Preview Lab → · Contrast checker → · Palette generator →