#3F3FB3#3F3FB3

#3F3FB3 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.3% C 0.179 H 276.3°. Best body text is #FFFFFF at 8.16:1 contrast (WCAG AA passes).

Color values

HEX	#3F3FB3
RGB	rgb(63, 63, 179)
HSL	hsl(240, 48%, 47%)
HSV	hsv(240, 65%, 70%)
CMYK	cmyk(64.8%, 64.8%, 0%, 29.8%)
CIE-LAB	lab(33.70, 36.34, -61.64)
CIE-LCH	lch(33.70, 71.55, 300.52°)
OKLab	oklab(44.34% 0.0195 -0.1777)
OKLCH	oklch(44.34% 0.179 276.3)
XYZ	xyz(11.9614, 7.8654, 43.5269)
Luminance	0.0787 (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

#3F3FB3 #B3B33F

analogous

#3F79B3 #3F3FB3 #793FB3

triadic

#3F3FB3 #B33F3F #3FB33F

tetradic

#3F3FB3 #B33F79 #B3B33F #3FB379

square

#3F3FB3 #B33F79 #B3B33F #3FB379

split-complementary

#3F3FB3 #B3793F #79B33F

monochromatic

#1F1F58 #2F2F86 #3F3FB3 #6666C9 #9393D9

Accessibility & contrast

On white

8.16

#3F3FB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#3F3FB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F3FB3

8.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F3FB3	#FFFFFF	#000000	##FFFFFF
##3F3FB3	1.00	8.16	2.57	8.16
#FFFFFF	8.16	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B7

Deuteranopia (green-blind)

#004AB1

Tritanopia (blue-blind)

#005D73

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3f3fb3;
/* rgb */ color: rgb(63, 63, 179);
/* oklch */ color: oklch(44.3% 0.179 276.3);

Tailwind

colors: {
  custom: {
    50: '#8274cb',
    500: '#3f3fb3',
    950: '#000000',
  },
}

SCSS

$custom: #3f3fb3;
$custom-light: #8274cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f3fb3",
  "rgb": {
    "r": 63,
    "g": 63,
    "b": 179
  },
  "hsl": {
    "h": 240,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.44342,
    "c": 0.17879,
    "h": 276.3
  },
  "luminance": 0.07866
}

Semantic roles & 50–950 ramp

primary

#3F3FB3

secondary

#C4C489

accent

#D850D8

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #3F3FB3

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

Preview Lab → · Contrast checker → · Palette generator →