#3F31AA#3F31AA

#3F31AA is a dark, vivid blue. Relative luminance 0.062; OKLCH L 41.3% C 0.183 H 279.9°. Best body text is #FFFFFF at 9.41:1 contrast (WCAG AA passes).

Color values

HEX	#3F31AA
RGB	rgb(63, 49, 170)
HSL	hsl(247, 55%, 43%)
HSV	hsv(247, 71%, 67%)
CMYK	cmyk(62.9%, 71.2%, 0%, 33.3%)
CIE-LAB	lab(29.80, 41.75, -62.66)
CIE-LCH	lch(29.80, 75.29, 303.67°)
OKLab	oklab(41.28% 0.0316 -0.1807)
OKLCH	oklch(41.28% 0.183 279.9)
XYZ	xyz(10.4016, 6.1549, 38.6623)
Luminance	0.0616 (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

#3F31AA #9CAA31

analogous

#315FAA #3F31AA #7B31AA

triadic

#3F31AA #AA3F31 #31AA3F

tetradic

#3F31AA #AA315F #9CAA31 #31AA7B

square

#3F31AA #AA315F #9CAA31 #31AA7B

split-complementary

#3F31AA #AA7B31 #5FAA31

monochromatic

#1C164B #2D237A #3F31AA #5B4DCC #877CD9

Accessibility & contrast

On white

9.41

#3F31AA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#3F31AA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F31AA

9.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F31AA	#FFFFFF	#000000	##FFFFFF
##3F31AA	1.00	9.41	2.23	9.41
#FFFFFF	9.41	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BAE

Deuteranopia (green-blind)

#0041A8

Tritanopia (blue-blind)

#00526A

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #3f31aa;
/* rgb */ color: rgb(63, 49, 170);
/* oklch */ color: oklch(41.3% 0.183 279.9);

Tailwind

colors: {
  custom: {
    50: '#816bc4',
    500: '#3f31aa',
    950: '#000000',
  },
}

SCSS

$custom: #3f31aa;
$custom-light: #816bc4;
$custom-dark: #000000;

JSON

{
  "hex": "#3f31aa",
  "rgb": {
    "r": 63,
    "g": 49,
    "b": 170
  },
  "hsl": {
    "h": 246.942,
    "s": 55.251,
    "l": 42.941
  },
  "oklch": {
    "l": 0.41278,
    "c": 0.18346,
    "h": 279.9
  },
  "luminance": 0.06156
}

Semantic roles & 50–950 ramp

primary

#3F31AA

secondary

#B9C275

accent

#DF49CD

background

#F8F6FC

surface

#F0EBF8

border

#CBC6D1

text

#0C0713

muted

#7D7A82

Preview Lab

Preview with #3F31AA

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

Preview Lab → · Contrast checker → · Palette generator →