#3F37D3#3F37D3

#3F37D3 is a mid, highly saturated blue. Relative luminance 0.085; OKLCH L 46.2% C 0.227 H 275.1°. Best body text is #FFFFFF at 7.78:1 contrast (WCAG AA passes).

Color values

HEX	#3F37D3
RGB	rgb(63, 55, 211)
HSL	hsl(243, 64%, 52%)
HSV	hsv(243, 74%, 83%)
CMYK	cmyk(70.1%, 73.9%, 0%, 17.3%)
CIE-LAB	lab(34.98, 51.46, -78.27)
CIE-LCH	lch(34.98, 93.67, 303.32°)
OKLab	oklab(46.17% 0.02 -0.2263)
OKLCH	oklch(46.17% 0.227 275.1)
XYZ	xyz(15.1701, 8.4908, 62.4548)
Luminance	0.0849 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blurple

#5539CC

ΔE00 2.62

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F37D3 #CBD337

analogous

#377DD3 #3F37D3 #8D37D3

triadic

#3F37D3 #D33F37 #37D33F

tetradic

#3F37D3 #D3377D #CBD337 #37D38D

square

#3F37D3 #D3377D #CBD337 #37D38D

split-complementary

#3F37D3 #D38D37 #7DD337

monochromatic

#1F1A76 #2C25A8 #3F37D3 #6F69DE #9F9BE9

Accessibility & contrast

On white

7.78

#3F37D3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.70

#3F37D3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F37D3

7.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F37D3	#FFFFFF	#000000	##FFFFFF
##3F37D3	1.00	7.78	2.70	7.78
#FFFFFF	7.78	1.00	21.00	1.00
#000000	2.70	21.00	1.00	21.00
##FFFFFF	7.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059D8

Deuteranopia (green-blind)

#004BD0

Tritanopia (blue-blind)

#006482

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3f37d3;
/* rgb */ color: rgb(63, 55, 211);
/* oklch */ color: oklch(46.2% 0.227 275.1);

Tailwind

colors: {
  custom: {
    50: '#8970e2',
    500: '#3f37d3',
    950: '#000000',
  },
}

SCSS

$custom: #3f37d3;
$custom-light: #8970e2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f37d3",
  "rgb": {
    "r": 63,
    "g": 55,
    "b": 211
  },
  "hsl": {
    "h": 243.077,
    "s": 63.934,
    "l": 52.157
  },
  "oklch": {
    "l": 0.46166,
    "c": 0.2272,
    "h": 275.1
  },
  "luminance": 0.08492
}

Semantic roles & 50–950 ramp

primary

#3F37D3

secondary

#D1D591

accent

#E741DE

background

#F9F6FE

surface

#F2ECFC

border

#CCC7D5

text

#0D0816

muted

#7E7B84

Preview Lab

Preview with #3F37D3

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

Preview Lab → · Contrast checker → · Palette generator →