#3F3FB2#3F3FB2

#3F3FB2 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.3% C 0.177 H 276.3°. Best body text is #FFFFFF at 8.19:1 contrast (WCAG AA passes).

Color values

HEX	#3F3FB2
RGB	rgb(63, 63, 178)
HSL	hsl(240, 48%, 47%)
HSV	hsv(240, 65%, 70%)
CMYK	cmyk(64.6%, 64.6%, 0%, 30.2%)
CIE-LAB	lab(33.62, 36.00, -61.19)
CIE-LCH	lch(33.62, 70.99, 300.47°)
OKLab	oklab(44.25% 0.0196 -0.1764)
OKLCH	oklch(44.25% 0.177 276.3)
XYZ	xyz(11.8607, 7.8251, 42.9962)
Luminance	0.0783 (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

#3F3FB2 #B2B23F

analogous

#3F79B2 #3F3FB2 #793FB2

triadic

#3F3FB2 #B23F3F #3FB23F

tetradic

#3F3FB2 #B23F79 #B2B23F #3FB279

square

#3F3FB2 #B23F79 #B2B23F #3FB279

split-complementary

#3F3FB2 #B2793F #79B23F

monochromatic

#1F1F58 #2F2F85 #3F3FB2 #6666C9 #9393D9

Accessibility & contrast

On white

8.19

#3F3FB2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#3F3FB2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F3FB2

8.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F3FB2	#FFFFFF	#000000	##FFFFFF
##3F3FB2	1.00	8.19	2.57	8.19
#FFFFFF	8.19	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B6

Deuteranopia (green-blind)

#004AB0

Tritanopia (blue-blind)

#005C73

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3f3fb2;
/* rgb */ color: rgb(63, 63, 178);
/* oklch */ color: oklch(44.3% 0.177 276.3);

Tailwind

colors: {
  custom: {
    50: '#8274ca',
    500: '#3f3fb2',
    950: '#000000',
  },
}

SCSS

$custom: #3f3fb2;
$custom-light: #8274ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f3fb2",
  "rgb": {
    "r": 63,
    "g": 63,
    "b": 178
  },
  "hsl": {
    "h": 240,
    "s": 47.718,
    "l": 47.255
  },
  "oklch": {
    "l": 0.44254,
    "c": 0.17747,
    "h": 276.3
  },
  "luminance": 0.07826
}

Semantic roles & 50–950 ramp

primary

#3F3FB2

secondary

#C4C489

accent

#D750D7

background

#F8F7FC

surface

#F0EDF8

border

#CBC8D1

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #3F3FB2

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

Preview Lab → · Contrast checker → · Palette generator →