#3F37C6#3F37C6

#3F37C6 is a dark, highly saturated blue. Relative luminance 0.079; OKLCH L 44.9% C 0.212 H 276.1°. Best body text is #FFFFFF at 8.16:1 contrast (WCAG AA passes).

Color values

HEX	#3F37C6
RGB	rgb(63, 55, 198)
HSL	hsl(243, 57%, 50%)
HSV	hsv(243, 72%, 78%)
CMYK	cmyk(68.2%, 72.2%, 0%, 22.4%)
CIE-LAB	lab(33.70, 47.33, -72.83)
CIE-LCH	lch(33.70, 86.86, 303.02°)
OKLab	oklab(44.87% 0.0225 -0.2105)
OKLCH	oklch(44.87% 0.212 276.1)
XYZ	xyz(13.6058, 7.8651, 54.2162)
Luminance	0.0787 (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

#3F37C6 #BEC637

analogous

#3776C6 #3F37C6 #8737C6

triadic

#3F37C6 #C63F37 #37C63F

tetradic

#3F37C6 #C63776 #BEC637 #37C687

square

#3F37C6 #C63776 #BEC637 #37C687

split-complementary

#3F37C6 #C68737 #76C637

monochromatic

#211C66 #302A96 #3F37C6 #6C66D4 #9A96E2

Accessibility & contrast

On white

8.16

#3F37C6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#3F37C6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F37C6

8.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F37C6	#FFFFFF	#000000	##FFFFFF
##3F37C6	1.00	8.16	2.57	8.16
#FFFFFF	8.16	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055CA

Deuteranopia (green-blind)

#0049C3

Tritanopia (blue-blind)

#005F7B

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3f37c6;
/* rgb */ color: rgb(63, 55, 198);
/* oklch */ color: oklch(44.9% 0.212 276.1);

Tailwind

colors: {
  custom: {
    50: '#8670d9',
    500: '#3f37c6',
    950: '#000000',
  },
}

SCSS

$custom: #3f37c6;
$custom-light: #8670d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f37c6",
  "rgb": {
    "r": 63,
    "g": 55,
    "b": 198
  },
  "hsl": {
    "h": 243.357,
    "s": 56.522,
    "l": 49.608
  },
  "oklch": {
    "l": 0.4487,
    "c": 0.21166,
    "h": 276.1
  },
  "luminance": 0.07866
}

Semantic roles & 50–950 ramp

primary

#3F37C6

secondary

#C9CD8C

accent

#E048D7

background

#F9F6FD

surface

#F1ECFB

border

#CBC7D4

text

#0D0715

muted

#7E7A83

Preview Lab

Preview with #3F37C6

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

Preview Lab → · Contrast checker → · Palette generator →