#3731C1#3731C1

#3731C1 is a dark, highly saturated blue. Relative luminance 0.069; OKLCH L 43.0% C 0.213 H 274.5°. Best body text is #FFFFFF at 8.85:1 contrast (WCAG AA passes).

Color values

HEX	#3731C1
RGB	rgb(55, 49, 193)
HSL	hsl(243, 60%, 47%)
HSV	hsv(243, 75%, 76%)
CMYK	cmyk(71.5%, 74.6%, 0%, 24.3%)
CIE-LAB	lab(31.48, 48.22, -73.58)
CIE-LCH	lch(31.48, 87.97, 303.24°)
OKLab	oklab(43% 0.0167 -0.2128)
OKLCH	oklch(43% 0.213 274.5)
XYZ	xyz(12.2963, 6.8579, 51.1174)
Luminance	0.0686 (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

#3731C1 #BBC131

analogous

#3173C1 #3731C1 #7F31C1

triadic

#3731C1 #C13731 #31C137

tetradic

#3731C1 #C13173 #BBC131 #31C17F

square

#3731C1 #C13173 #BBC131 #31C17F

split-complementary

#3731C1 #C17F31 #73C131

monochromatic

#1B185F #292590 #3731C1 #5F5AD5 #8E8BE2

Accessibility & contrast

On white

8.85

#3731C1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#3731C1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3731C1

8.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3731C1	#FFFFFF	#000000	##FFFFFF
##3731C1	1.00	8.85	2.37	8.85
#FFFFFF	8.85	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051C5

Deuteranopia (green-blind)

#0043BE

Tritanopia (blue-blind)

#005B77

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3731c1;
/* rgb */ color: rgb(55, 49, 193);
/* oklch */ color: oklch(43.0% 0.213 274.5);

Tailwind

colors: {
  custom: {
    50: '#836bd5',
    500: '#3731c1',
    950: '#000000',
  },
}

SCSS

$custom: #3731c1;
$custom-light: #836bd5;
$custom-dark: #000000;

JSON

{
  "hex": "#3731c1",
  "rgb": {
    "r": 55,
    "g": 49,
    "b": 193
  },
  "hsl": {
    "h": 242.5,
    "s": 59.504,
    "l": 47.451
  },
  "oklch": {
    "l": 0.43004,
    "c": 0.21344,
    "h": 274.5
  },
  "luminance": 0.06859
}

Semantic roles & 50–950 ramp

primary

#3731C1

secondary

#C9CC82

accent

#E345DC

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3731C1

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

Preview Lab → · Contrast checker → · Palette generator →