#3F31B7#3F31B7

#3F31B7 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 42.5% C 0.200 H 278.4°. Best body text is #FFFFFF at 9.00:1 contrast (WCAG AA passes).

Color values

HEX	#3F31B7
RGB	rgb(63, 49, 183)
HSL	hsl(246, 58%, 45%)
HSV	hsv(246, 73%, 72%)
CMYK	cmyk(65.6%, 73.2%, 0%, 28.2%)
CIE-LAB	lab(31.05, 45.89, -68.37)
CIE-LCH	lch(31.05, 82.34, 303.87°)
OKLab	oklab(42.54% 0.0291 -0.1974)
OKLCH	oklch(42.54% 0.2 278.4)
XYZ	xyz(11.6927, 6.6713, 45.4621)
Luminance	0.0667 (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

#3F31B7 #A9B731

analogous

#3166B7 #3F31B7 #8231B7

triadic

#3F31B7 #B73F31 #31B73F

tetradic

#3F31B7 #B73166 #A9B731 #31B782

square

#3F31B7 #B73166 #A9B731 #31B782

split-complementary

#3F31B7 #B78231 #66B731

monochromatic

#1E1756 #2E2487 #3F31B7 #6154D1 #8E84DE

Accessibility & contrast

On white

9.00

#3F31B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#3F31B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F31B7

9.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F31B7	#FFFFFF	#000000	##FFFFFF
##3F31B7	1.00	9.00	2.33	9.00
#FFFFFF	9.00	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EBB

Deuteranopia (green-blind)

#0044B5

Tritanopia (blue-blind)

#005771

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3f31b7;
/* rgb */ color: rgb(63, 49, 183);
/* oklch */ color: oklch(42.5% 0.200 278.4);

Tailwind

colors: {
  custom: {
    50: '#846bce',
    500: '#3f31b7',
    950: '#000000',
  },
}

SCSS

$custom: #3f31b7;
$custom-light: #846bce;
$custom-dark: #000000;

JSON

{
  "hex": "#3f31b7",
  "rgb": {
    "r": 63,
    "g": 49,
    "b": 183
  },
  "hsl": {
    "h": 246.269,
    "s": 57.759,
    "l": 45.49
  },
  "oklch": {
    "l": 0.42543,
    "c": 0.19953,
    "h": 278.4
  },
  "luminance": 0.06672
}

Semantic roles & 50–950 ramp

primary

#3F31B7

secondary

#C0C87C

accent

#E147D1

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3F31B7

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

Preview Lab → · Contrast checker → · Palette generator →