#3F31DB#3F31DB

#3F31DB is a mid, highly saturated blue. Relative luminance 0.084; OKLCH L 46.2% C 0.242 H 275.0°. Best body text is #FFFFFF at 7.85:1 contrast (WCAG AA passes).

Color values

HEX	#3F31DB
RGB	rgb(63, 49, 219)
HSL	hsl(245, 70%, 53%)
HSV	hsv(245, 78%, 86%)
CMYK	cmyk(71.2%, 77.6%, 0%, 14.1%)
CIE-LAB	lab(34.73, 56.99, -83.30)
CIE-LCH	lch(34.73, 100.93, 304.38°)
OKLab	oklab(46.24% 0.021 -0.2409)
OKLCH	oklch(46.24% 0.242 275)
XYZ	xyz(15.9302, 8.3663, 67.7794)
Luminance	0.0837 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blurple

#5539CC

ΔE00 3.11

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F31DB #CDDB31

analogous

#3178DB #3F31DB #9431DB

triadic

#3F31DB #DB3F31 #31DB3F

tetradic

#3F31DB #DB3178 #CDDB31 #31DB94

square

#3F31DB #DB3178 #CDDB31 #31DB94

split-complementary

#3F31DB #DB9431 #78DB31

monochromatic

#1E167C #2B1FB0 #3F31DB #7065E4 #A099ED

Accessibility & contrast

On white

7.85

#3F31DB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#3F31DB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F31DB

7.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F31DB	#FFFFFF	#000000	##FFFFFF
##3F31DB	1.00	7.85	2.67	7.85
#FFFFFF	7.85	1.00	21.00	1.00
#000000	2.67	21.00	1.00	21.00
##FFFFFF	7.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059E0

Deuteranopia (green-blind)

#004AD8

Tritanopia (blue-blind)

#006586

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3f31db;
/* rgb */ color: rgb(63, 49, 219);
/* oklch */ color: oklch(46.2% 0.242 275.0);

Tailwind

colors: {
  custom: {
    50: '#8b6de8',
    500: '#3f31db',
    950: '#000000',
  },
}

SCSS

$custom: #3f31db;
$custom-light: #8b6de8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f31db",
  "rgb": {
    "r": 63,
    "g": 49,
    "b": 219
  },
  "hsl": {
    "h": 244.941,
    "s": 70.248,
    "l": 52.549
  },
  "oklch": {
    "l": 0.46235,
    "c": 0.2418,
    "h": 275
  },
  "luminance": 0.08368
}

Semantic roles & 50–950 ramp

primary

#3F31DB

secondary

#D3D98F

accent

#ED3BDE

background

#F9F6FE

surface

#F2ECFD

border

#CCC7D5

text

#0E0716

muted

#7E7A84

Preview Lab

Preview with #3F31DB

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

Preview Lab → · Contrast checker → · Palette generator →