#3F3FB8#3F3FB8

#3F3FB8 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 44.8% C 0.185 H 275.9°. Best body text is #FFFFFF at 8.03:1 contrast (WCAG AA passes).

Color values

HEX	#3F3FB8
RGB	rgb(63, 63, 184)
HSL	hsl(240, 49%, 48%)
HSV	hsv(240, 66%, 72%)
CMYK	cmyk(65.8%, 65.8%, 0%, 27.8%)
CIE-LAB	lab(34.13, 38.03, -63.90)
CIE-LCH	lch(34.13, 74.36, 300.76°)
OKLab	oklab(44.79% 0.019 -0.1843)
OKLCH	oklch(44.79% 0.185 275.9)
XYZ	xyz(12.4763, 8.0714, 46.2386)
Luminance	0.0807 (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

#3F3FB8 #B8B83F

analogous

#3F7BB8 #3F3FB8 #7B3FB8

triadic

#3F3FB8 #B83F3F #3FB83F

tetradic

#3F3FB8 #B83F7B #B8B83F #3FB87B

square

#3F3FB8 #B83F7B #B8B83F #3FB87B

split-complementary

#3F3FB8 #B87B3F #7BB83F

monochromatic

#20205D #2F2F8A #3F3FB8 #6969CC #9696DB

Accessibility & contrast

On white

8.03

#3F3FB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#3F3FB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F3FB8

8.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F3FB8	#FFFFFF	#000000	##FFFFFF
##3F3FB8	1.00	8.03	2.61	8.03
#FFFFFF	8.03	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BC

Deuteranopia (green-blind)

#004BB6

Tritanopia (blue-blind)

#005E76

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3f3fb8;
/* rgb */ color: rgb(63, 63, 184);
/* oklch */ color: oklch(44.8% 0.185 275.9);

Tailwind

colors: {
  custom: {
    50: '#8374ce',
    500: '#3f3fb8',
    950: '#000000',
  },
}

SCSS

$custom: #3f3fb8;
$custom-light: #8374ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3f3fb8",
  "rgb": {
    "r": 63,
    "g": 63,
    "b": 184
  },
  "hsl": {
    "h": 240,
    "s": 48.988,
    "l": 48.431
  },
  "oklch": {
    "l": 0.44788,
    "c": 0.18532,
    "h": 275.9
  },
  "luminance": 0.08072
}

Semantic roles & 50–950 ramp

primary

#3F3FB8

secondary

#C7C78C

accent

#D94FD9

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3F3FB8

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

Preview Lab → · Contrast checker → · Palette generator →