#3731C0#3731C0

#3731C0 is a dark, highly saturated blue. Relative luminance 0.068; OKLCH L 42.9% C 0.212 H 274.6°. Best body text is #FFFFFF at 8.89:1 contrast (WCAG AA passes).

Color values

HEX	#3731C0
RGB	rgb(55, 49, 192)
HSL	hsl(243, 59%, 47%)
HSV	hsv(243, 74%, 75%)
CMYK	cmyk(71.4%, 74.5%, 0%, 24.7%)
CIE-LAB	lab(31.38, 47.90, -73.16)
CIE-LCH	lch(31.38, 87.44, 303.21°)
OKLab	oklab(42.9% 0.0169 -0.2116)
OKLCH	oklch(42.9% 0.212 274.6)
XYZ	xyz(12.1851, 6.8134, 50.5319)
Luminance	0.0682 (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

#3731C0 #BAC031

analogous

#3173C0 #3731C0 #7E31C0

triadic

#3731C0 #C03731 #31C037

tetradic

#3731C0 #C03173 #BAC031 #31C07E

square

#3731C0 #C03173 #BAC031 #31C07E

split-complementary

#3731C0 #C07E31 #73C031

monochromatic

#1B185E #29258F #3731C0 #5F59D5 #8E8AE1

Accessibility & contrast

On white

8.89

#3731C0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#3731C0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3731C0

8.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3731C0	#FFFFFF	#000000	##FFFFFF
##3731C0	1.00	8.89	2.36	8.89
#FFFFFF	8.89	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050C4

Deuteranopia (green-blind)

#0043BD

Tritanopia (blue-blind)

#005A76

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3731c0;
/* rgb */ color: rgb(55, 49, 192);
/* oklch */ color: oklch(42.9% 0.212 274.6);

Tailwind

colors: {
  custom: {
    50: '#826bd4',
    500: '#3731c0',
    950: '#000000',
  },
}

SCSS

$custom: #3731c0;
$custom-light: #826bd4;
$custom-dark: #000000;

JSON

{
  "hex": "#3731c0",
  "rgb": {
    "r": 55,
    "g": 49,
    "b": 192
  },
  "hsl": {
    "h": 242.517,
    "s": 59.336,
    "l": 47.255
  },
  "oklch": {
    "l": 0.42901,
    "c": 0.21225,
    "h": 274.6
  },
  "luminance": 0.06815
}

Semantic roles & 50–950 ramp

primary

#3731C0

secondary

#C8CB82

accent

#E345DC

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3731C0

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

Preview Lab → · Contrast checker → · Palette generator →