#3F3FBA#3F3FBA

#3F3FBA is a dark, vivid blue. Relative luminance 0.082; OKLCH L 45.0% C 0.188 H 275.8°. Best body text is #FFFFFF at 7.98:1 contrast (WCAG AA passes).

Color values

HEX	#3F3FBA
RGB	rgb(63, 63, 186)
HSL	hsl(240, 49%, 49%)
HSV	hsv(240, 66%, 73%)
CMYK	cmyk(66.1%, 66.1%, 0%, 27.1%)
CIE-LAB	lab(34.31, 38.70, -64.79)
CIE-LCH	lch(34.31, 75.47, 300.85°)
OKLab	oklab(44.97% 0.0189 -0.187)
OKLCH	oklch(44.97% 0.188 275.8)
XYZ	xyz(12.6874, 8.1558, 47.3505)
Luminance	0.0816 (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

#3F3FBA #BABA3F

analogous

#3F7DBA #3F3FBA #7D3FBA

triadic

#3F3FBA #BA3F3F #3FBA3F

tetradic

#3F3FBA #BA3F7D #BABA3F #3FBA7D

square

#3F3FBA #BA3F7D #BABA3F #3FBA7D

split-complementary

#3F3FBA #BA7D3F #7DBA3F

monochromatic

#20205F #30308C #3F3FBA #6A6ACC #9797DC

Accessibility & contrast

On white

7.98

#3F3FBA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#3F3FBA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F3FBA

7.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F3FBA	#FFFFFF	#000000	##FFFFFF
##3F3FBA	1.00	7.98	2.63	7.98
#FFFFFF	7.98	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	7.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BE

Deuteranopia (green-blind)

#004BB8

Tritanopia (blue-blind)

#005F77

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3f3fba;
/* rgb */ color: rgb(63, 63, 186);
/* oklch */ color: oklch(45.0% 0.188 275.8);

Tailwind

colors: {
  custom: {
    50: '#8374d0',
    500: '#3f3fba',
    950: '#000000',
  },
}

SCSS

$custom: #3f3fba;
$custom-light: #8374d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f3fba",
  "rgb": {
    "r": 63,
    "g": 63,
    "b": 186
  },
  "hsl": {
    "h": 240,
    "s": 49.398,
    "l": 48.824
  },
  "oklch": {
    "l": 0.44968,
    "c": 0.18791,
    "h": 275.8
  },
  "luminance": 0.08157
}

Semantic roles & 50–950 ramp

primary

#3F3FBA

secondary

#C8C88D

accent

#D94FD9

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3F3FBA

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

Preview Lab → · Contrast checker → · Palette generator →