#3F39BC#3F39BC

#3F39BC is a dark, vivid blue. Relative luminance 0.076; OKLCH L 44.2% C 0.197 H 276.7°. Best body text is #FFFFFF at 8.32:1 contrast (WCAG AA passes).

Color values

HEX	#3F39BC
RGB	rgb(63, 57, 188)
HSL	hsl(243, 53%, 48%)
HSV	hsv(243, 70%, 74%)
CMYK	cmyk(66.5%, 69.7%, 0%, 26.3%)
CIE-LAB	lab(33.16, 42.95, -67.84)
CIE-LCH	lch(33.16, 80.30, 302.34°)
OKLab	oklab(44.2% 0.0229 -0.1959)
OKLCH	oklch(44.2% 0.197 276.7)
XYZ	xyz(12.5872, 7.6128, 48.3733)
Luminance	0.0761 (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

#3F39BC #B6BC39

analogous

#3974BC #3F39BC #8039BC

triadic

#3F39BC #BC3F39 #39BC3F

tetradic

#3F39BC #BC3974 #B6BC39 #39BC80

square

#3F39BC #BC3974 #B6BC39 #39BC80

split-complementary

#3F39BC #BC8039 #74BC39

monochromatic

#201D5E #2F2B8D #3F39BC #6863D0 #9592DE

Accessibility & contrast

On white

8.32

#3F39BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#3F39BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F39BC

8.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F39BC	#FFFFFF	#000000	##FFFFFF
##3F39BC	1.00	8.32	2.52	8.32
#FFFFFF	8.32	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054C0

Deuteranopia (green-blind)

#0048BA

Tritanopia (blue-blind)

#005D76

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3f39bc;
/* rgb */ color: rgb(63, 57, 188);
/* oklch */ color: oklch(44.2% 0.197 276.7);

Tailwind

colors: {
  custom: {
    50: '#8471d1',
    500: '#3f39bc',
    950: '#000000',
  },
}

SCSS

$custom: #3f39bc;
$custom-light: #8471d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f39bc",
  "rgb": {
    "r": 63,
    "g": 57,
    "b": 188
  },
  "hsl": {
    "h": 242.748,
    "s": 53.469,
    "l": 48.039
  },
  "oklch": {
    "l": 0.44198,
    "c": 0.19723,
    "h": 276.7
  },
  "luminance": 0.07614
}

Semantic roles & 50–950 ramp

primary

#3F39BC

secondary

#C6C988

accent

#DD4BD6

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #3F39BC

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

Preview Lab → · Contrast checker → · Palette generator →