#3F3FB7#3F3FB7

#3F3FB7 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.7% C 0.184 H 276.0°. Best body text is #FFFFFF at 8.06:1 contrast (WCAG AA passes).

Color values

HEX	#3F3FB7
RGB	rgb(63, 63, 183)
HSL	hsl(240, 49%, 48%)
HSV	hsv(240, 66%, 72%)
CMYK	cmyk(65.6%, 65.6%, 0%, 28.2%)
CIE-LAB	lab(34.04, 37.69, -63.45)
CIE-LCH	lch(34.04, 73.80, 300.71°)
OKLab	oklab(44.7% 0.0191 -0.183)
OKLCH	oklch(44.7% 0.184 276)
XYZ	xyz(12.3719, 8.0296, 45.6885)
Luminance	0.0803 (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

#3F3FB7 #B7B73F

analogous

#3F7BB7 #3F3FB7 #7B3FB7

triadic

#3F3FB7 #B73F3F #3FB73F

tetradic

#3F3FB7 #B73F7B #B7B73F #3FB77B

square

#3F3FB7 #B73F7B #B7B73F #3FB77B

split-complementary

#3F3FB7 #B77B3F #7BB73F

monochromatic

#20205C #2F2F89 #3F3FB7 #6868CB #9696DB

Accessibility & contrast

On white

8.06

#3F3FB7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#3F3FB7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F3FB7

8.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F3FB7	#FFFFFF	#000000	##FFFFFF
##3F3FB7	1.00	8.06	2.61	8.06
#FFFFFF	8.06	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BB

Deuteranopia (green-blind)

#004BB5

Tritanopia (blue-blind)

#005E75

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3f3fb7;
/* rgb */ color: rgb(63, 63, 183);
/* oklch */ color: oklch(44.7% 0.184 276.0);

Tailwind

colors: {
  custom: {
    50: '#8374ce',
    500: '#3f3fb7',
    950: '#000000',
  },
}

SCSS

$custom: #3f3fb7;
$custom-light: #8374ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3f3fb7",
  "rgb": {
    "r": 63,
    "g": 63,
    "b": 183
  },
  "hsl": {
    "h": 240,
    "s": 48.78,
    "l": 48.235
  },
  "oklch": {
    "l": 0.44698,
    "c": 0.18402,
    "h": 276
  },
  "luminance": 0.08031
}

Semantic roles & 50–950 ramp

primary

#3F3FB7

secondary

#C6C68B

accent

#D84FD8

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3F3FB7

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

Preview Lab → · Contrast checker → · Palette generator →