#3F39B7#3F39B7

#3F39B7 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.7% C 0.191 H 277.1°. Best body text is #FFFFFF at 8.47:1 contrast (WCAG AA passes).

Color values

HEX	#3F39B7
RGB	rgb(63, 57, 183)
HSL	hsl(243, 53%, 47%)
HSV	hsv(243, 69%, 72%)
CMYK	cmyk(65.6%, 68.9%, 0%, 28.2%)
CIE-LAB	lab(32.70, 41.31, -65.65)
CIE-LCH	lch(32.70, 77.56, 302.18°)
OKLab	oklab(43.73% 0.0236 -0.1895)
OKLCH	oklch(43.73% 0.191 277.1)
XYZ	xyz(12.0575, 7.4009, 45.5837)
Luminance	0.0740 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 3.05

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F39B7 #B1B739

analogous

#3972B7 #3F39B7 #7E39B7

triadic

#3F39B7 #B73F39 #39B73F

tetradic

#3F39B7 #B73972 #B1B739 #39B77E

square

#3F39B7 #B73972 #B1B739 #39B77E

split-complementary

#3F39B7 #B77E39 #72B739

monochromatic

#1F1C5A #2F2A88 #3F39B7 #6560CD #928EDC

Accessibility & contrast

On white

8.47

#3F39B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#3F39B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F39B7

8.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F39B7	#FFFFFF	#000000	##FFFFFF
##3F39B7	1.00	8.47	2.48	8.47
#FFFFFF	8.47	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052BB

Deuteranopia (green-blind)

#0047B5

Tritanopia (blue-blind)

#005B73

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3f39b7;
/* rgb */ color: rgb(63, 57, 183);
/* oklch */ color: oklch(43.7% 0.191 277.1);

Tailwind

colors: {
  custom: {
    50: '#8370ce',
    500: '#3f39b7',
    950: '#000000',
  },
}

SCSS

$custom: #3f39b7;
$custom-light: #8370ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3f39b7",
  "rgb": {
    "r": 63,
    "g": 57,
    "b": 183
  },
  "hsl": {
    "h": 242.857,
    "s": 52.5,
    "l": 47.059
  },
  "oklch": {
    "l": 0.43727,
    "c": 0.19094,
    "h": 277.1
  },
  "luminance": 0.07402
}

Semantic roles & 50–950 ramp

primary

#3F39B7

secondary

#C4C785

accent

#DC4CD5

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3F39B7

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

Preview Lab → · Contrast checker → · Palette generator →