#3F34AB#3F34AB

#3F34AB is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.8% C 0.181 H 279.2°. Best body text is #FFFFFF at 9.17:1 contrast (WCAG AA passes).

Color values

HEX	#3F34AB
RGB	rgb(63, 52, 171)
HSL	hsl(246, 53%, 44%)
HSV	hsv(246, 70%, 67%)
CMYK	cmyk(63.2%, 69.6%, 0%, 32.9%)
CIE-LAB	lab(30.53, 40.33, -62.07)
CIE-LCH	lch(30.53, 74.02, 303.01°)
OKLab	oklab(41.83% 0.0291 -0.179)
OKLCH	oklch(41.83% 0.181 279.2)
XYZ	xyz(10.6262, 6.4522, 39.2056)
Luminance	0.0645 (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

#3F34AB #A0AB34

analogous

#3464AB #3F34AB #7A34AB

triadic

#3F34AB #AB3F34 #34AB3F

tetradic

#3F34AB #AB3464 #A0AB34 #34AB7A

square

#3F34AB #AB3464 #A0AB34 #34AB7A

split-complementary

#3F34AB #AB7A34 #64AB34

monochromatic

#1C174D #2E267C #3F34AB #5D52CA #8981D9

Accessibility & contrast

On white

9.17

#3F34AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#3F34AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F34AB

9.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F34AB	#FFFFFF	#000000	##FFFFFF
##3F34AB	1.00	9.17	2.29	9.17
#FFFFFF	9.17	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CAF

Deuteranopia (green-blind)

#0043A9

Tritanopia (blue-blind)

#00546B

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #3f34ab;
/* rgb */ color: rgb(63, 52, 171);
/* oklch */ color: oklch(41.8% 0.181 279.2);

Tailwind

colors: {
  custom: {
    50: '#816dc5',
    500: '#3f34ab',
    950: '#000000',
  },
}

SCSS

$custom: #3f34ab;
$custom-light: #816dc5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f34ab",
  "rgb": {
    "r": 63,
    "g": 52,
    "b": 171
  },
  "hsl": {
    "h": 245.546,
    "s": 53.363,
    "l": 43.725
  },
  "oklch": {
    "l": 0.41826,
    "c": 0.18134,
    "h": 279.2
  },
  "luminance": 0.06453
}

Semantic roles & 50–950 ramp

primary

#3F34AB

secondary

#BBC279

accent

#DD4BCF

background

#F8F6FC

surface

#F0EBF8

border

#CBC6D1

text

#0C0713

muted

#7D7A82

Preview Lab

Preview with #3F34AB

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

Preview Lab → · Contrast checker → · Palette generator →