#3F439C#3F439C

#3F439C is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.1% C 0.142 H 276.7°. Best body text is #FFFFFF at 8.42:1 contrast (WCAG AA passes).

Color values

HEX	#3F439C
RGB	rgb(63, 67, 156)
HSL	hsl(237, 42%, 43%)
HSV	hsv(237, 60%, 61%)
CMYK	cmyk(59.6%, 57.1%, 0%, 38.8%)
CIE-LAB	lab(32.86, 25.90, -49.23)
CIE-LCH	lch(32.86, 55.63, 297.75°)
OKLab	oklab(43.15% 0.0166 -0.1412)
OKLCH	oklch(43.15% 0.142 276.7)
XYZ	xyz(10.0559, 7.4706, 32.3581)
Luminance	0.0747 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F439C #9C983F

analogous

#3F729C #3F439C #693F9C

triadic

#3F439C #9C3F43 #439C3F

tetradic

#3F439C #9C3F72 #9C983F #3F9C69

square

#3F439C #9C3F72 #9C983F #3F9C69

split-complementary

#3F439C #9C693F #729C3F

monochromatic

#1C1E45 #2D3070 #3F439C #5B60BD #878ACE

Accessibility & contrast

On white

8.42

#3F439C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#3F439C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F439C

8.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F439C	#FFFFFF	#000000	##FFFFFF
##3F439C	1.00	8.42	2.49	8.42
#FFFFFF	8.42	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00519F

Deuteranopia (green-blind)

#00499A

Tritanopia (blue-blind)

#005869

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3f439c;
/* rgb */ color: rgb(63, 67, 156);
/* oklch */ color: oklch(43.1% 0.142 276.7);

Tailwind

colors: {
  custom: {
    50: '#7d77ba',
    500: '#3f439c',
    950: '#000000',
  },
}

SCSS

$custom: #3f439c;
$custom-light: #7d77ba;
$custom-dark: #000000;

JSON

{
  "hex": "#3f439c",
  "rgb": {
    "r": 63,
    "g": 67,
    "b": 156
  },
  "hsl": {
    "h": 237.419,
    "s": 42.466,
    "l": 42.941
  },
  "oklch": {
    "l": 0.43146,
    "c": 0.1422,
    "h": 276.7
  },
  "luminance": 0.07471
}

Semantic roles & 50–950 ramp

primary

#3F439C

secondary

#B9B67E

accent

#CD56D2

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #3F439C

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

Preview Lab → · Contrast checker → · Palette generator →