#3F308D#3F308D

#3F308D is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.5% C 0.147 H 284.5°. Best body text is #FFFFFF at 10.40:1 contrast (WCAG AA passes).

Color values

HEX	#3F308D
RGB	rgb(63, 48, 141)
HSL	hsl(250, 49%, 37%)
HSV	hsv(250, 66%, 55%)
CMYK	cmyk(55.3%, 66%, 0%, 44.7%)
CIE-LAB	lab(27.00, 32.99, -49.56)
CIE-LCH	lch(27.00, 59.53, 303.65°)
OKLab	oklab(38.47% 0.0368 -0.1423)
OKLCH	oklch(38.47% 0.147 284.5)
XYZ	xyz(7.9131, 5.0933, 25.7603)
Luminance	0.0509 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F308D #7E8D30

analogous

#30508D #3F308D #6D308D

triadic

#3F308D #8D3F30 #308D3F

tetradic

#3F308D #8D3050 #7E8D30 #308D6D

square

#3F308D #8D3050 #7E8D30 #308D6D

split-complementary

#3F308D #8D6D30 #508D30

monochromatic

#161132 #2B205F #3F308D #5340BB #7B6BCD

Accessibility & contrast

On white

10.40

#3F308D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#3F308D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F308D

10.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F308D	#FFFFFF	#000000	##FFFFFF
##3F308D	1.00	10.40	2.02	10.40
#FFFFFF	10.40	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004390

Deuteranopia (green-blind)

#003D8B

Tritanopia (blue-blind)

#1D475A

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #3f308d;
/* rgb */ color: rgb(63, 48, 141);
/* oklch */ color: oklch(38.5% 0.147 284.5);

Tailwind

colors: {
  custom: {
    50: '#7c69af',
    500: '#3f308d',
    950: '#000000',
  },
}

SCSS

$custom: #3f308d;
$custom-light: #7c69af;
$custom-dark: #000000;

JSON

{
  "hex": "#3f308d",
  "rgb": {
    "r": 63,
    "g": 48,
    "b": 141
  },
  "hsl": {
    "h": 249.677,
    "s": 49.206,
    "l": 37.059
  },
  "oklch": {
    "l": 0.38466,
    "c": 0.14698,
    "h": 284.5
  },
  "luminance": 0.05094
}

Semantic roles & 50–950 ramp

primary

#3F308D

secondary

#A7B465

accent

#D94FC3

background

#F7F6FA

surface

#EEEBF5

border

#C9C6CF

text

#0A0610

muted

#7C7A7F

Preview Lab

Preview with #3F308D

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

Preview Lab → · Contrast checker → · Palette generator →