#343D99#343D99

#343D99 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.0% C 0.149 H 273.6°. Best body text is #FFFFFF at 9.24:1 contrast (WCAG AA passes).

Color values

HEX	#343D99
RGB	rgb(52, 61, 153)
HSL	hsl(235, 49%, 40%)
HSV	hsv(235, 66%, 60%)
CMYK	cmyk(66%, 60.1%, 0%, 40%)
CIE-LAB	lab(30.32, 26.82, -51.56)
CIE-LCH	lch(30.32, 58.12, 297.49°)
OKLab	oklab(40.99% 0.0094 -0.1484)
OKLCH	oklch(40.99% 0.149 273.6)
XYZ	xyz(8.8328, 6.3667, 30.8942)
Luminance	0.0637 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343D99 #999034

analogous

#347099 #343D99 #5D3499

triadic

#343D99 #99343D #3D9934

tetradic

#343D99 #993470 #999034 #34995D

square

#343D99 #993470 #999034 #34995D

split-complementary

#343D99 #995D34 #709934

monochromatic

#15193E #242B6B #343D99 #4954C1 #777FD1

Accessibility & contrast

On white

9.24

#343D99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#343D99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343D99

9.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343D99	#FFFFFF	#000000	##FFFFFF
##343D99	1.00	9.24	2.27	9.24
#FFFFFF	9.24	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9C

Deuteranopia (green-blind)

#004397

Tritanopia (blue-blind)

#005465

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #343d99;
/* rgb */ color: rgb(52, 61, 153);
/* oklch */ color: oklch(41.0% 0.149 273.6);

Tailwind

colors: {
  custom: {
    50: '#7872b8',
    500: '#343d99',
    950: '#000000',
  },
}

SCSS

$custom: #343d99;
$custom-light: #7872b8;
$custom-dark: #000000;

JSON

{
  "hex": "#343d99",
  "rgb": {
    "r": 52,
    "g": 61,
    "b": 153
  },
  "hsl": {
    "h": 234.653,
    "s": 49.268,
    "l": 40.196
  },
  "oklch": {
    "l": 0.40993,
    "c": 0.14874,
    "h": 273.6
  },
  "luminance": 0.06367
}

Semantic roles & 50–950 ramp

primary

#343D99

secondary

#B9B370

accent

#CD4FD9

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0811

muted

#7C7B80

Preview Lab

Preview with #343D99

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

Preview Lab → · Contrast checker → · Palette generator →