#3731C3#3731C3

#3731C3 is a dark, highly saturated blue. Relative luminance 0.069; OKLCH L 43.2% C 0.216 H 274.3°. Best body text is #FFFFFF at 8.79:1 contrast (WCAG AA passes).

Color values

HEX	#3731C3
RGB	rgb(55, 49, 195)
HSL	hsl(242, 60%, 48%)
HSV	hsv(242, 75%, 76%)
CMYK	cmyk(71.8%, 74.9%, 0%, 23.5%)
CIE-LAB	lab(31.69, 48.86, -74.41)
CIE-LCH	lch(31.69, 89.02, 303.29°)
OKLab	oklab(43.21% 0.0163 -0.2152)
OKLCH	oklch(43.21% 0.216 274.3)
XYZ	xyz(12.5209, 6.9477, 52.3004)
Luminance	0.0695 (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

#3731C3 #BDC331

analogous

#3174C3 #3731C3 #8031C3

triadic

#3731C3 #C33731 #31C337

tetradic

#3731C3 #C33174 #BDC331 #31C380

square

#3731C3 #C33174 #BDC331 #31C380

split-complementary

#3731C3 #C38031 #74C331

monochromatic

#1B1861 #292592 #3731C3 #605BD6 #908CE2

Accessibility & contrast

On white

8.79

#3731C3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#3731C3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3731C3

8.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3731C3	#FFFFFF	#000000	##FFFFFF
##3731C3	1.00	8.79	2.39	8.79
#FFFFFF	8.79	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051C7

Deuteranopia (green-blind)

#0044C0

Tritanopia (blue-blind)

#005C78

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3731c3;
/* rgb */ color: rgb(55, 49, 195);
/* oklch */ color: oklch(43.2% 0.216 274.3);

Tailwind

colors: {
  custom: {
    50: '#836bd7',
    500: '#3731c3',
    950: '#000000',
  },
}

SCSS

$custom: #3731c3;
$custom-light: #836bd7;
$custom-dark: #000000;

JSON

{
  "hex": "#3731c3",
  "rgb": {
    "r": 55,
    "g": 49,
    "b": 195
  },
  "hsl": {
    "h": 242.466,
    "s": 59.836,
    "l": 47.843
  },
  "oklch": {
    "l": 0.43212,
    "c": 0.21584,
    "h": 274.3
  },
  "luminance": 0.06949
}

Semantic roles & 50–950 ramp

primary

#3731C3

secondary

#C9CC83

accent

#E345DC

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0715

muted

#7D7A83

Preview Lab

Preview with #3731C3

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

Preview Lab → · Contrast checker → · Palette generator →