#343CA3#343CA3

#343CA3 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.7% C 0.164 H 273.5°. Best body text is #FFFFFF at 9.05:1 contrast (WCAG AA passes).

Color values

HEX	#343CA3
RGB	rgb(52, 60, 163)
HSL	hsl(236, 52%, 42%)
HSV	hsv(236, 68%, 64%)
CMYK	cmyk(68.1%, 63.2%, 0%, 36.1%)
CIE-LAB	lab(30.89, 31.07, -56.69)
CIE-LCH	lch(30.89, 64.64, 298.72°)
OKLab	oklab(41.67% 0.0099 -0.1635)
OKLCH	oklch(41.67% 0.164 273.5)
XYZ	xyz(9.6407, 6.6052, 35.4101)
Luminance	0.0661 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343CA3 #A39B34

analogous

#3473A3 #343CA3 #6434A3

triadic

#343CA3 #A3343C #3CA334

tetradic

#343CA3 #A33473 #A39B34 #34A364

square

#343CA3 #A33473 #A39B34 #34A364

split-complementary

#343CA3 #A36434 #73A334

monochromatic

#161A46 #252B75 #343CA3 #4E56C6 #7C83D5

Accessibility & contrast

On white

9.05

#343CA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#343CA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343CA3

9.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343CA3	#FFFFFF	#000000	##FFFFFF
##343CA3	1.00	9.05	2.32	9.05
#FFFFFF	9.05	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA6

Deuteranopia (green-blind)

#0044A1

Tritanopia (blue-blind)

#00566A

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #343ca3;
/* rgb */ color: rgb(52, 60, 163);
/* oklch */ color: oklch(41.7% 0.164 273.5);

Tailwind

colors: {
  custom: {
    50: '#7a72bf',
    500: '#343ca3',
    950: '#000000',
  },
}

SCSS

$custom: #343ca3;
$custom-light: #7a72bf;
$custom-dark: #000000;

JSON

{
  "hex": "#343ca3",
  "rgb": {
    "r": 52,
    "g": 60,
    "b": 163
  },
  "hsl": {
    "h": 235.676,
    "s": 51.628,
    "l": 42.157
  },
  "oklch": {
    "l": 0.41672,
    "c": 0.16381,
    "h": 273.5
  },
  "luminance": 0.06606
}

Semantic roles & 50–950 ramp

primary

#343CA3

secondary

#BEB975

accent

#D14DDB

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #343CA3

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

Preview Lab → · Contrast checker → · Palette generator →