#343FB4#343FB4

#343FB4 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.7% C 0.183 H 272.1°. Best body text is #FFFFFF at 8.35:1 contrast (WCAG AA passes).

Color values

HEX	#343FB4
RGB	rgb(52, 63, 180)
HSL	hsl(235, 55%, 45%)
HSV	hsv(235, 71%, 71%)
CMYK	cmyk(71.1%, 65%, 0%, 29.4%)
CIE-LAB	lab(33.09, 35.19, -63.26)
CIE-LCH	lch(33.09, 72.39, 299.09°)
OKLab	oklab(43.74% 0.0067 -0.1827)
OKLCH	oklch(43.74% 0.183 272.1)
XYZ	xyz(11.4291, 7.5792, 44.0318)
Luminance	0.0758 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343FB4 #B4A934

analogous

#347FB4 #343FB4 #6934B4

triadic

#343FB4 #B4343F #3FB434

tetradic

#343FB4 #B4347F #B4A934 #34B469

square

#343FB4 #B4347F #B4A934 #34B469

split-complementary

#343FB4 #B46934 #7FB434

monochromatic

#191E55 #262E85 #343FB4 #5761CE #868EDC

Accessibility & contrast

On white

8.35

#343FB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#343FB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343FB4

8.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343FB4	#FFFFFF	#000000	##FFFFFF
##343FB4	1.00	8.35	2.52	8.35
#FFFFFF	8.35	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B8

Deuteranopia (green-blind)

#0048B2

Tritanopia (blue-blind)

#005E74

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #343fb4;
/* rgb */ color: rgb(52, 63, 180);
/* oklch */ color: oklch(43.7% 0.183 272.1);

Tailwind

colors: {
  custom: {
    50: '#7d74cb',
    500: '#343fb4',
    950: '#000000',
  },
}

SCSS

$custom: #343fb4;
$custom-light: #7d74cb;
$custom-dark: #000000;

JSON

{
  "hex": "#343fb4",
  "rgb": {
    "r": 52,
    "g": 63,
    "b": 180
  },
  "hsl": {
    "h": 234.844,
    "s": 55.172,
    "l": 45.49
  },
  "oklch": {
    "l": 0.43739,
    "c": 0.18287,
    "h": 272.1
  },
  "luminance": 0.0758
}

Semantic roles & 50–950 ramp

primary

#343FB4

secondary

#C6C07E

accent

#D249DF

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #343FB4

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

Preview Lab → · Contrast checker → · Palette generator →