#343CA5#343CA5

#343CA5 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.9% C 0.167 H 273.4°. Best body text is #FFFFFF at 8.99:1 contrast (WCAG AA passes).

Color values

HEX	#343CA5
RGB	rgb(52, 60, 165)
HSL	hsl(236, 52%, 43%)
HSV	hsv(236, 68%, 65%)
CMYK	cmyk(68.5%, 63.6%, 0%, 35.3%)
CIE-LAB	lab(31.06, 31.78, -57.62)
CIE-LCH	lch(31.06, 65.80, 298.88°)
OKLab	oklab(41.85% 0.0098 -0.1662)
OKLCH	oklch(41.85% 0.167 273.4)
XYZ	xyz(9.8213, 6.6775, 36.3613)
Luminance	0.0668 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343CA5 #A59D34

analogous

#3475A5 #343CA5 #6434A5

triadic

#343CA5 #A5343C #3CA534

tetradic

#343CA5 #A53475 #A59D34 #34A564

square

#343CA5 #A53475 #A59D34 #34A564

split-complementary

#343CA5 #A56434 #75A534

monochromatic

#171A48 #252B76 #343CA5 #4F57C7 #7D84D6

Accessibility & contrast

On white

8.99

#343CA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#343CA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343CA5

8.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343CA5	#FFFFFF	#000000	##FFFFFF
##343CA5	1.00	8.99	2.34	8.99
#FFFFFF	8.99	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA8

Deuteranopia (green-blind)

#0044A3

Tritanopia (blue-blind)

#00576B

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #343ca5;
/* rgb */ color: rgb(52, 60, 165);
/* oklch */ color: oklch(41.9% 0.167 273.4);

Tailwind

colors: {
  custom: {
    50: '#7a72c1',
    500: '#343ca5',
    950: '#000000',
  },
}

SCSS

$custom: #343ca5;
$custom-light: #7a72c1;
$custom-dark: #000000;

JSON

{
  "hex": "#343ca5",
  "rgb": {
    "r": 52,
    "g": 60,
    "b": 165
  },
  "hsl": {
    "h": 235.752,
    "s": 52.074,
    "l": 42.549
  },
  "oklch": {
    "l": 0.4185,
    "c": 0.16652,
    "h": 273.4
  },
  "luminance": 0.06678
}

Semantic roles & 50–950 ramp

primary

#343CA5

secondary

#BFBA76

accent

#D14CDC

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #343CA5

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

Preview Lab → · Contrast checker → · Palette generator →