#343CA4#343CA4

#343CA4 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.8% C 0.165 H 273.4°. Best body text is #FFFFFF at 9.02:1 contrast (WCAG AA passes).

Color values

HEX	#343CA4
RGB	rgb(52, 60, 164)
HSL	hsl(236, 52%, 42%)
HSV	hsv(236, 68%, 64%)
CMYK	cmyk(68.3%, 63.4%, 0%, 35.7%)
CIE-LAB	lab(30.98, 31.42, -57.15)
CIE-LCH	lch(30.98, 65.22, 298.80°)
OKLab	oklab(41.76% 0.0099 -0.1649)
OKLCH	oklch(41.76% 0.165 273.4)
XYZ	xyz(9.7306, 6.6412, 35.8838)
Luminance	0.0664 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343CA4 #A49C34

analogous

#3474A4 #343CA4 #6434A4

triadic

#343CA4 #A4343C #3CA434

tetradic

#343CA4 #A43474 #A49C34 #34A464

square

#343CA4 #A43474 #A49C34 #34A464

split-complementary

#343CA4 #A46434 #74A434

monochromatic

#171A47 #252B76 #343CA4 #4E57C7 #7D83D6

Accessibility & contrast

On white

9.02

#343CA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#343CA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343CA4

9.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343CA4	#FFFFFF	#000000	##FFFFFF
##343CA4	1.00	9.02	2.33	9.02
#FFFFFF	9.02	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA7

Deuteranopia (green-blind)

#0044A2

Tritanopia (blue-blind)

#00566A

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #343ca4;
/* rgb */ color: rgb(52, 60, 164);
/* oklch */ color: oklch(41.8% 0.165 273.4);

Tailwind

colors: {
  custom: {
    50: '#7a72c0',
    500: '#343ca4',
    950: '#000000',
  },
}

SCSS

$custom: #343ca4;
$custom-light: #7a72c0;
$custom-dark: #000000;

JSON

{
  "hex": "#343ca4",
  "rgb": {
    "r": 52,
    "g": 60,
    "b": 164
  },
  "hsl": {
    "h": 235.714,
    "s": 51.852,
    "l": 42.353
  },
  "oklch": {
    "l": 0.41761,
    "c": 0.16517,
    "h": 273.4
  },
  "luminance": 0.06642
}

Semantic roles & 50–950 ramp

primary

#343CA4

secondary

#BFB975

accent

#D14CDB

background

#F8F6FB

surface

#EFECF7

border

#CAC7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #343CA4

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

Preview Lab → · Contrast checker → · Palette generator →