#3F3F99#3F3F99

#3F3F99 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.1% C 0.143 H 278.3°. Best body text is #FFFFFF at 8.81:1 contrast (WCAG AA passes).

Color values

HEX	#3F3F99
RGB	rgb(63, 63, 153)
HSL	hsl(240, 42%, 42%)
HSV	hsv(240, 59%, 60%)
CMYK	cmyk(58.8%, 58.8%, 0%, 40%)
CIE-LAB	lab(31.60, 27.47, -49.44)
CIE-LCH	lch(31.60, 56.56, 299.05°)
OKLab	oklab(42.15% 0.0207 -0.1419)
OKLCH	oklch(42.15% 0.143 278.3)
XYZ	xyz(9.5753, 6.9110, 30.9602)
Luminance	0.0691 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F3F99 #99993F

analogous

#3F6C99 #3F3F99 #6C3F99

triadic

#3F3F99 #993F3F #3F993F

tetradic

#3F3F99 #993F6C #99993F #3F996C

square

#3F3F99 #993F6C #99993F #3F996C

split-complementary

#3F3F99 #996C3F #6C993F

monochromatic

#1B1B42 #2D2D6E #3F3F99 #5A5ABB #8585CD

Accessibility & contrast

On white

8.81

#3F3F99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#3F3F99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F3F99

8.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F3F99	#FFFFFF	#000000	##FFFFFF
##3F3F99	1.00	8.81	2.38	8.81
#FFFFFF	8.81	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004E9C

Deuteranopia (green-blind)

#004797

Tritanopia (blue-blind)

#055465

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3f3f99;
/* rgb */ color: rgb(63, 63, 153);
/* oklch */ color: oklch(42.1% 0.143 278.3);

Tailwind

colors: {
  custom: {
    50: '#7d74b8',
    500: '#3f3f99',
    950: '#000000',
  },
}

SCSS

$custom: #3f3f99;
$custom-light: #7d74b8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f3f99",
  "rgb": {
    "r": 63,
    "g": 63,
    "b": 153
  },
  "hsl": {
    "h": 240,
    "s": 41.667,
    "l": 42.353
  },
  "oklch": {
    "l": 0.42145,
    "c": 0.14338,
    "h": 278.3
  },
  "luminance": 0.06912
}

Semantic roles & 50–950 ramp

primary

#3F3F99

secondary

#B7B77C

accent

#D156D1

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0A0811

muted

#7C7B80

Preview Lab

Preview with #3F3F99

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

Preview Lab → · Contrast checker → · Palette generator →