#3F39B5#3F39B5

#3F39B5 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.5% C 0.188 H 277.3°. Best body text is #FFFFFF at 8.52:1 contrast (WCAG AA passes).

Color values

HEX	#3F39B5
RGB	rgb(63, 57, 181)
HSL	hsl(243, 52%, 47%)
HSV	hsv(243, 69%, 71%)
CMYK	cmyk(65.2%, 68.5%, 0%, 29%)
CIE-LAB	lab(32.52, 40.65, -64.76)
CIE-LCH	lch(32.52, 76.46, 302.12°)
OKLab	oklab(43.54% 0.0239 -0.1869)
OKLCH	oklch(43.54% 0.188 277.3)
XYZ	xyz(11.8508, 7.3182, 44.4951)
Luminance	0.0732 (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

#3F39B5 #AFB539

analogous

#3971B5 #3F39B5 #7D39B5

triadic

#3F39B5 #B53F39 #39B53F

tetradic

#3F39B5 #B53971 #AFB539 #39B57D

square

#3F39B5 #B53971 #AFB539 #39B57D

split-complementary

#3F39B5 #B57D39 #71B539

monochromatic

#1F1C58 #2F2A86 #3F39B5 #645FCD #918DDB

Accessibility & contrast

On white

8.52

#3F39B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#3F39B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F39B5

8.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F39B5	#FFFFFF	#000000	##FFFFFF
##3F39B5	1.00	8.52	2.46	8.52
#FFFFFF	8.52	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B9

Deuteranopia (green-blind)

#0047B3

Tritanopia (blue-blind)

#005A72

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3f39b5;
/* rgb */ color: rgb(63, 57, 181);
/* oklch */ color: oklch(43.5% 0.188 277.3);

Tailwind

colors: {
  custom: {
    50: '#8370cc',
    500: '#3f39b5',
    950: '#000000',
  },
}

SCSS

$custom: #3f39b5;
$custom-light: #8370cc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f39b5",
  "rgb": {
    "r": 63,
    "g": 57,
    "b": 181
  },
  "hsl": {
    "h": 242.903,
    "s": 52.101,
    "l": 46.667
  },
  "oklch": {
    "l": 0.4354,
    "c": 0.1884,
    "h": 277.3
  },
  "luminance": 0.07319
}

Semantic roles & 50–950 ramp

primary

#3F39B5

secondary

#C3C684

accent

#DC4CD5

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3F39B5

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

Preview Lab → · Contrast checker → · Palette generator →