#343FA1#343FA1

#343FA1 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.1% C 0.157 H 272.7°. Best body text is #FFFFFF at 8.85:1 contrast (WCAG AA passes).

Color values

HEX	#343FA1
RGB	rgb(52, 63, 161)
HSL	hsl(234, 51%, 42%)
HSV	hsv(234, 68%, 63%)
CMYK	cmyk(67.7%, 60.9%, 0%, 36.9%)
CIE-LAB	lab(31.48, 28.40, -54.52)
CIE-LCH	lch(31.48, 61.47, 297.51°)
OKLab	oklab(42.06% 0.0075 -0.1571)
OKLCH	oklch(42.06% 0.157 272.7)
XYZ	xyz(9.6246, 6.8574, 34.5277)
Luminance	0.0686 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343FA1 #A19634

analogous

#3476A1 #343FA1 #6034A1

triadic

#343FA1 #A1343F #3FA134

tetradic

#343FA1 #A13476 #A19634 #34A160

square

#343FA1 #A13476 #A19634 #34A160

split-complementary

#343FA1 #A16034 #76A134

monochromatic

#161B44 #252D73 #343FA1 #4D59C5 #7B84D4

Accessibility & contrast

On white

8.85

#343FA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#343FA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343FA1

8.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343FA1	#FFFFFF	#000000	##FFFFFF
##343FA1	1.00	8.85	2.37	8.85
#FFFFFF	8.85	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA4

Deuteranopia (green-blind)

#00459F

Tritanopia (blue-blind)

#00576A

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #343fa1;
/* rgb */ color: rgb(52, 63, 161);
/* oklch */ color: oklch(42.1% 0.157 272.7);

Tailwind

colors: {
  custom: {
    50: '#7974be',
    500: '#343fa1',
    950: '#000000',
  },
}

SCSS

$custom: #343fa1;
$custom-light: #7974be;
$custom-dark: #000000;

JSON

{
  "hex": "#343fa1",
  "rgb": {
    "r": 52,
    "g": 63,
    "b": 161
  },
  "hsl": {
    "h": 233.945,
    "s": 51.174,
    "l": 41.765
  },
  "oklch": {
    "l": 0.42055,
    "c": 0.1573,
    "h": 272.7
  },
  "luminance": 0.06858
}

Semantic roles & 50–950 ramp

primary

#343FA1

secondary

#BDB674

accent

#CC4DDB

background

#F7F7FB

surface

#EEEDF7

border

#C9C8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #343FA1

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

Preview Lab → · Contrast checker → · Palette generator →