#3F31BB#3F31BB

#3F31BB is a dark, highly saturated blue. Relative luminance 0.068; OKLCH L 42.9% C 0.204 H 277.9°. Best body text is #FFFFFF at 8.87:1 contrast (WCAG AA passes).

Color values

HEX	#3F31BB
RGB	rgb(63, 49, 187)
HSL	hsl(246, 58%, 46%)
HSV	hsv(246, 74%, 73%)
CMYK	cmyk(66.3%, 73.8%, 0%, 26.7%)
CIE-LAB	lab(31.44, 47.15, -70.09)
CIE-LCH	lch(31.44, 84.47, 303.93°)
OKLab	oklab(42.94% 0.0282 -0.2024)
OKLCH	oklch(42.94% 0.204 277.9)
XYZ	xyz(12.1150, 6.8402, 47.6859)
Luminance	0.0684 (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

#3F31BB #ADBB31

analogous

#3168BB #3F31BB #8431BB

triadic

#3F31BB #BB3F31 #31BB3F

tetradic

#3F31BB #BB3168 #ADBB31 #31BB84

square

#3F31BB #BB3168 #ADBB31 #31BB84

split-complementary

#3F31BB #BB8431 #68BB31

monochromatic

#1E185A #2F248B #3F31BB #6356D3 #9087E0

Accessibility & contrast

On white

8.87

#3F31BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#3F31BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F31BB

8.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F31BB	#FFFFFF	#000000	##FFFFFF
##3F31BB	1.00	8.87	2.37	8.87
#FFFFFF	8.87	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FBF

Deuteranopia (green-blind)

#0044B8

Tritanopia (blue-blind)

#005873

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3f31bb;
/* rgb */ color: rgb(63, 49, 187);
/* oklch */ color: oklch(42.9% 0.204 277.9);

Tailwind

colors: {
  custom: {
    50: '#856bd1',
    500: '#3f31bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f31bb;
$custom-light: #856bd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f31bb",
  "rgb": {
    "r": 63,
    "g": 49,
    "b": 187
  },
  "hsl": {
    "h": 246.087,
    "s": 58.475,
    "l": 46.275
  },
  "oklch": {
    "l": 0.42941,
    "c": 0.20438,
    "h": 277.9
  },
  "luminance": 0.06841
}

Semantic roles & 50–950 ramp

primary

#3F31BB

secondary

#C2C97F

accent

#E246D2

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3F31BB

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

Preview Lab → · Contrast checker → · Palette generator →