#3F31BF#3F31BF

#3F31BF is a dark, highly saturated blue. Relative luminance 0.070; OKLCH L 43.3% C 0.209 H 277.5°. Best body text is #FFFFFF at 8.74:1 contrast (WCAG AA passes).

Color values

HEX	#3F31BF
RGB	rgb(63, 49, 191)
HSL	hsl(246, 59%, 47%)
HSV	hsv(246, 74%, 75%)
CMYK	cmyk(67%, 74.3%, 0%, 25.1%)
CIE-LAB	lab(31.84, 48.40, -71.79)
CIE-LCH	lch(31.84, 86.58, 303.99°)
OKLab	oklab(43.34% 0.0274 -0.2074)
OKLCH	oklch(43.34% 0.209 277.5)
XYZ	xyz(12.5491, 7.0139, 49.9726)
Luminance	0.0702 (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

#3F31BF #B1BF31

analogous

#316ABF #3F31BF #8631BF

triadic

#3F31BF #BF3F31 #31BF3F

tetradic

#3F31BF #BF316A #B1BF31 #31BF86

square

#3F31BF #BF316A #B1BF31 #31BF86

split-complementary

#3F31BF #BF8631 #6ABF31

monochromatic

#1F185E #2F258E #3F31BF #6559D4 #928AE1

Accessibility & contrast

On white

8.74

#3F31BF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#3F31BF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F31BF

8.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F31BF	#FFFFFF	#000000	##FFFFFF
##3F31BF	1.00	8.74	2.40	8.74
#FFFFFF	8.74	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051C3

Deuteranopia (green-blind)

#0045BC

Tritanopia (blue-blind)

#005A76

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3f31bf;
/* rgb */ color: rgb(63, 49, 191);
/* oklch */ color: oklch(43.3% 0.209 277.5);

Tailwind

colors: {
  custom: {
    50: '#856cd4',
    500: '#3f31bf',
    950: '#000000',
  },
}

SCSS

$custom: #3f31bf;
$custom-light: #856cd4;
$custom-dark: #000000;

JSON

{
  "hex": "#3f31bf",
  "rgb": {
    "r": 63,
    "g": 49,
    "b": 191
  },
  "hsl": {
    "h": 245.915,
    "s": 59.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.43342,
    "c": 0.20919,
    "h": 277.5
  },
  "luminance": 0.07015
}

Semantic roles & 50–950 ramp

primary

#3F31BF

secondary

#C4CB81

accent

#E245D3

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0D0714

muted

#7D7A83

Preview Lab

Preview with #3F31BF

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

Preview Lab → · Contrast checker → · Palette generator →