#3F31BC#3F31BC

#3F31BC is a dark, highly saturated blue. Relative luminance 0.069; OKLCH L 43.0% C 0.206 H 277.8°. Best body text is #FFFFFF at 8.84:1 contrast (WCAG AA passes).

Color values

HEX	#3F31BC
RGB	rgb(63, 49, 188)
HSL	hsl(246, 59%, 46%)
HSV	hsv(246, 74%, 74%)
CMYK	cmyk(66.5%, 73.9%, 0%, 26.3%)
CIE-LAB	lab(31.54, 47.46, -70.52)
CIE-LCH	lch(31.54, 85.00, 303.94°)
OKLab	oklab(43.04% 0.028 -0.2037)
OKLCH	oklch(43.04% 0.206 277.8)
XYZ	xyz(12.2224, 6.8832, 48.2517)
Luminance	0.0688 (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

#3F31BC #AEBC31

analogous

#3169BC #3F31BC #8531BC

triadic

#3F31BC #BC3F31 #31BC3F

tetradic

#3F31BC #BC3169 #AEBC31 #31BC85

square

#3F31BC #BC3169 #AEBC31 #31BC85

split-complementary

#3F31BC #BC8531 #69BC31

monochromatic

#1E185B #2F248B #3F31BC #6457D3 #9088E0

Accessibility & contrast

On white

8.84

#3F31BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#3F31BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F31BC

8.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F31BC	#FFFFFF	#000000	##FFFFFF
##3F31BC	1.00	8.84	2.38	8.84
#FFFFFF	8.84	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050C0

Deuteranopia (green-blind)

#0044B9

Tritanopia (blue-blind)

#005974

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3f31bc;
/* rgb */ color: rgb(63, 49, 188);
/* oklch */ color: oklch(43.0% 0.206 277.8);

Tailwind

colors: {
  custom: {
    50: '#856cd1',
    500: '#3f31bc',
    950: '#000000',
  },
}

SCSS

$custom: #3f31bc;
$custom-light: #856cd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f31bc",
  "rgb": {
    "r": 63,
    "g": 49,
    "b": 188
  },
  "hsl": {
    "h": 246.043,
    "s": 58.65,
    "l": 46.471
  },
  "oklch": {
    "l": 0.43041,
    "c": 0.20559,
    "h": 277.8
  },
  "luminance": 0.06884
}

Semantic roles & 50–950 ramp

primary

#3F31BC

secondary

#C2CA7F

accent

#E246D2

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3F31BC

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

Preview Lab → · Contrast checker → · Palette generator →