#3437D1#3437D1

#3437D1 is a mid, highly saturated blue. Relative luminance 0.081; OKLCH L 45.3% C 0.228 H 271.9°. Best body text is #FFFFFF at 8.04:1 contrast (WCAG AA passes).

Color values

HEX	#3437D1
RGB	rgb(52, 55, 209)
HSL	hsl(239, 63%, 51%)
HSV	hsv(239, 75%, 82%)
CMYK	cmyk(75.1%, 73.7%, 0%, 18%)
CIE-LAB	lab(34.12, 49.83, -78.57)
CIE-LCH	lch(34.12, 93.04, 302.38°)
OKLab	oklab(45.31% 0.0076 -0.2274)
OKLCH	oklch(45.31% 0.228 271.9)
XYZ	xyz(14.2871, 8.0644, 61.1129)
Luminance	0.0807 (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

#3437D1 #D1CE34

analogous

#3485D1 #3437D1 #8034D1

triadic

#3437D1 #D13437 #37D134

tetradic

#3437D1 #D13485 #D1CE34 #34D180

square

#3437D1 #D13485 #D1CE34 #34D180

split-complementary

#3437D1 #D18034 #85D134

monochromatic

#1A1B71 #2527A3 #3437D1 #6668DC #9899E8

Accessibility & contrast

On white

8.04

#3437D1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#3437D1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3437D1

8.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3437D1	#FFFFFF	#000000	##FFFFFF
##3437D1	1.00	8.04	2.61	8.04
#FFFFFF	8.04	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058D5

Deuteranopia (green-blind)

#0048CE

Tritanopia (blue-blind)

#006481

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3437d1;
/* rgb */ color: rgb(52, 55, 209);
/* oklch */ color: oklch(45.3% 0.228 271.9);

Tailwind

colors: {
  custom: {
    50: '#8570e0',
    500: '#3437d1',
    950: '#000000',
  },
}

SCSS

$custom: #3437d1;
$custom-light: #8570e0;
$custom-dark: #000000;

JSON

{
  "hex": "#3437d1",
  "rgb": {
    "r": 52,
    "g": 55,
    "b": 209
  },
  "hsl": {
    "h": 238.854,
    "s": 63.052,
    "l": 51.176
  },
  "oklch": {
    "l": 0.45314,
    "c": 0.22756,
    "h": 271.9
  },
  "luminance": 0.08066
}

Semantic roles & 50–950 ramp

primary

#3437D1

secondary

#D3D28E

accent

#E342E6

background

#F9F6FD

surface

#F1ECFB

border

#CBC7D4

text

#0D0715

muted

#7E7A83

Preview Lab

Preview with #3437D1

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

Preview Lab → · Contrast checker → · Palette generator →