#343CC9#343CC9

#343CC9 is a mid, highly saturated blue. Relative luminance 0.082; OKLCH L 45.2% C 0.213 H 271.7°. Best body text is #FFFFFF at 7.97:1 contrast (WCAG AA passes).

Color values

HEX	#343CC9
RGB	rgb(52, 60, 201)
HSL	hsl(237, 59%, 50%)
HSV	hsv(237, 74%, 79%)
CMYK	cmyk(74.1%, 70.1%, 0%, 21.2%)
CIE-LAB	lab(34.35, 44.31, -73.54)
CIE-LCH	lch(34.35, 85.85, 301.07°)
OKLab	oklab(45.24% 0.0064 -0.2128)
OKLCH	oklch(45.24% 0.213 271.7)
XYZ	xyz(13.5711, 8.1774, 56.1102)
Luminance	0.0818 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue Blue

#2242C7

ΔE00 2.54

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#343CC9 #C9C134

analogous

#3486C9 #343CC9 #7734C9

triadic

#343CC9 #C9343C #3CC934

tetradic

#343CC9 #C93486 #C9C134 #34C977

square

#343CC9 #C93486 #C9C134 #34C977

split-complementary

#343CC9 #C97734 #86C934

monochromatic

#1B1F68 #272D98 #343CC9 #636AD7 #9498E3

Accessibility & contrast

On white

7.97

#343CC9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#343CC9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #343CC9

7.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##343CC9	#FFFFFF	#000000	##FFFFFF
##343CC9	1.00	7.97	2.64	7.97
#FFFFFF	7.97	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058CD

Deuteranopia (green-blind)

#004AC6

Tritanopia (blue-blind)

#00637E

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #343cc9;
/* rgb */ color: rgb(52, 60, 201);
/* oklch */ color: oklch(45.2% 0.213 271.7);

Tailwind

colors: {
  custom: {
    50: '#8273db',
    500: '#343cc9',
    950: '#000000',
  },
}

SCSS

$custom: #343cc9;
$custom-light: #8273db;
$custom-dark: #000000;

JSON

{
  "hex": "#343cc9",
  "rgb": {
    "r": 52,
    "g": 60,
    "b": 201
  },
  "hsl": {
    "h": 236.779,
    "s": 58.893,
    "l": 49.608
  },
  "oklch": {
    "l": 0.45243,
    "c": 0.21289,
    "h": 271.7
  },
  "luminance": 0.08179
}

Semantic roles & 50–950 ramp

primary

#343CC9

secondary

#CECB8A

accent

#DA46E2

background

#F8F7FD

surface

#F0EDFB

border

#CBC8D4

text

#0C0815

muted

#7D7B83

Preview Lab

Preview with #343CC9

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

Preview Lab → · Contrast checker → · Palette generator →