#3F3FB5#3F3FB5

#3F3FB5 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.5% C 0.181 H 276.1°. Best body text is #FFFFFF at 8.11:1 contrast (WCAG AA passes).

Color values

HEX	#3F3FB5
RGB	rgb(63, 63, 181)
HSL	hsl(240, 48%, 48%)
HSV	hsv(240, 65%, 71%)
CMYK	cmyk(65.2%, 65.2%, 0%, 29%)
CIE-LAB	lab(33.87, 37.01, -62.55)
CIE-LCH	lch(33.87, 72.68, 300.62°)
OKLab	oklab(44.52% 0.0193 -0.1804)
OKLCH	oklch(44.52% 0.181 276.1)
XYZ	xyz(12.1652, 7.9469, 44.5999)
Luminance	0.0795 (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

#3F3FB5 #B5B53F

analogous

#3F7AB5 #3F3FB5 #7A3FB5

triadic

#3F3FB5 #B53F3F #3FB53F

tetradic

#3F3FB5 #B53F7A #B5B53F #3FB57A

square

#3F3FB5 #B53F7A #B5B53F #3FB57A

split-complementary

#3F3FB5 #B57A3F #7AB53F

monochromatic

#1F1F5A #2F2F88 #3F3FB5 #6767CA #9494DA

Accessibility & contrast

On white

8.11

#3F3FB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#3F3FB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F3FB5

8.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F3FB5	#FFFFFF	#000000	##FFFFFF
##3F3FB5	1.00	8.11	2.59	8.11
#FFFFFF	8.11	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B9

Deuteranopia (green-blind)

#004AB3

Tritanopia (blue-blind)

#005D74

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3f3fb5;
/* rgb */ color: rgb(63, 63, 181);
/* oklch */ color: oklch(44.5% 0.181 276.1);

Tailwind

colors: {
  custom: {
    50: '#8274cc',
    500: '#3f3fb5',
    950: '#000000',
  },
}

SCSS

$custom: #3f3fb5;
$custom-light: #8274cc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f3fb5",
  "rgb": {
    "r": 63,
    "g": 63,
    "b": 181
  },
  "hsl": {
    "h": 240,
    "s": 48.361,
    "l": 47.843
  },
  "oklch": {
    "l": 0.4452,
    "c": 0.18141,
    "h": 276.1
  },
  "luminance": 0.07948
}

Semantic roles & 50–950 ramp

primary

#3F3FB5

secondary

#C5C58A

accent

#D850D8

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #3F3FB5

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

Preview Lab → · Contrast checker → · Palette generator →