#343FBB#343FBB

#343FBB is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.4% C 0.192 H 271.8°. Best body text is #FFFFFF at 8.16:1 contrast (WCAG AA passes).

Color values

HEX	#343FBB
RGB	rgb(52, 63, 187)
HSL	hsl(235, 56%, 47%)
HSV	hsv(235, 72%, 73%)
CMYK	cmyk(72.2%, 66.3%, 0%, 26.7%)
CIE-LAB	lab(33.71, 37.66, -66.38)
CIE-LCH	lch(33.71, 76.32, 299.57°)
OKLab	oklab(44.39% 0.0062 -0.1919)
OKLCH	oklch(44.39% 0.192 271.8)
XYZ	xyz(12.1603, 7.8717, 47.8826)
Luminance	0.0787 (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

#343FBB #BBB034

analogous

#3483BB #343FBB #6D34BB

triadic

#343FBB #BB343F #3FBB34

tetradic

#343FBB #BB3483 #BBB034 #34BB6D

square

#343FBB #BB3483 #BBB034 #34BB6D

split-complementary

#343FBB #BB6D34 #83BB34

monochromatic

#191F5B #272F8B #343FBB #5B65D1 #8B92DF

Accessibility & contrast

On white

8.16

#343FBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#343FBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343FBB

8.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343FBB	#FFFFFF	#000000	##FFFFFF
##343FBB	1.00	8.16	2.57	8.16
#FFFFFF	8.16	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BF

Deuteranopia (green-blind)

#0049B9

Tritanopia (blue-blind)

#006077

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #343fbb;
/* rgb */ color: rgb(52, 63, 187);
/* oklch */ color: oklch(44.4% 0.192 271.8);

Tailwind

colors: {
  custom: {
    50: '#7f74d1',
    500: '#343fbb',
    950: '#000000',
  },
}

SCSS

$custom: #343fbb;
$custom-light: #7f74d1;
$custom-dark: #000000;

JSON

{
  "hex": "#343fbb",
  "rgb": {
    "r": 52,
    "g": 63,
    "b": 187
  },
  "hsl": {
    "h": 235.111,
    "s": 56.485,
    "l": 46.863
  },
  "oklch": {
    "l": 0.44386,
    "c": 0.19197,
    "h": 271.8
  },
  "luminance": 0.07873
}

Semantic roles & 50–950 ramp

primary

#343FBB

secondary

#C9C382

accent

#D348E0

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #343FBB

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

Preview Lab → · Contrast checker → · Palette generator →