#343FA5#343FA5

#343FA5 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.4% C 0.163 H 272.6°. Best body text is #FFFFFF at 8.75:1 contrast (WCAG AA passes).

Color values

HEX	#343FA5
RGB	rgb(52, 63, 165)
HSL	hsl(234, 52%, 43%)
HSV	hsv(234, 68%, 65%)
CMYK	cmyk(68.5%, 61.8%, 0%, 35.3%)
CIE-LAB	lab(31.81, 29.84, -56.40)
CIE-LCH	lch(31.81, 63.80, 297.88°)
OKLab	oklab(42.4% 0.0075 -0.1626)
OKLCH	oklch(42.4% 0.163 272.6)
XYZ	xyz(9.9829, 7.0008, 36.4152)
Luminance	0.0700 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343FA5 #A59A34

analogous

#3478A5 #343FA5 #6134A5

triadic

#343FA5 #A5343F #3FA534

tetradic

#343FA5 #A53478 #A59A34 #34A561

square

#343FA5 #A53478 #A59A34 #34A561

split-complementary

#343FA5 #A56134 #78A534

monochromatic

#171B48 #252D76 #343FA5 #4F5AC7 #7D86D6

Accessibility & contrast

On white

8.75

#343FA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#343FA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343FA5

8.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343FA5	#FFFFFF	#000000	##FFFFFF
##343FA5	1.00	8.75	2.40	8.75
#FFFFFF	8.75	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A8

Deuteranopia (green-blind)

#0046A3

Tritanopia (blue-blind)

#00596C

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #343fa5;
/* rgb */ color: rgb(52, 63, 165);
/* oklch */ color: oklch(42.4% 0.163 272.6);

Tailwind

colors: {
  custom: {
    50: '#7a74c1',
    500: '#343fa5',
    950: '#000000',
  },
}

SCSS

$custom: #343fa5;
$custom-light: #7a74c1;
$custom-dark: #000000;

JSON

{
  "hex": "#343fa5",
  "rgb": {
    "r": 52,
    "g": 63,
    "b": 165
  },
  "hsl": {
    "h": 234.159,
    "s": 52.074,
    "l": 42.549
  },
  "oklch": {
    "l": 0.424,
    "c": 0.16279,
    "h": 272.6
  },
  "luminance": 0.07002
}

Semantic roles & 50–950 ramp

primary

#343FA5

secondary

#BFB876

accent

#CE4CDC

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #343FA5

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

Preview Lab → · Contrast checker → · Palette generator →