#3731CE#3731CE

#3731CE is a dark, highly saturated blue. Relative luminance 0.075; OKLCH L 44.4% C 0.229 H 273.5°. Best body text is #FFFFFF at 8.42:1 contrast (WCAG AA passes).

Color values

HEX	#3731CE
RGB	rgb(55, 49, 206)
HSL	hsl(242, 62%, 50%)
HSV	hsv(242, 76%, 81%)
CMYK	cmyk(73.3%, 76.2%, 0%, 19.2%)
CIE-LAB	lab(32.84, 52.35, -78.93)
CIE-LCH	lch(32.84, 94.71, 303.55°)
OKLab	oklab(44.37% 0.0141 -0.2284)
OKLCH	oklch(44.37% 0.229 273.5)
XYZ	xyz(13.8107, 7.4637, 59.0933)
Luminance	0.0746 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blurple

#5539CC

ΔE00 3.71

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3731CE #C8CE31

analogous

#3179CE #3731CE #8631CE

triadic

#3731CE #CE3731 #31CE37

tetradic

#3731CE #CE3179 #C8CE31 #31CE86

square

#3731CE #CE3179 #C8CE31 #31CE86

split-complementary

#3731CE #CE8631 #79CE31

monochromatic

#1D196B #2A259D #3731CE #6762DA #9794E6

Accessibility & contrast

On white

8.42

#3731CE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#3731CE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3731CE

8.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3731CE	#FFFFFF	#000000	##FFFFFF
##3731CE	1.00	8.42	2.49	8.42
#FFFFFF	8.42	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055D2

Deuteranopia (green-blind)

#0046CB

Tritanopia (blue-blind)

#00607E

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3731ce;
/* rgb */ color: rgb(55, 49, 206);
/* oklch */ color: oklch(44.4% 0.229 273.5);

Tailwind

colors: {
  custom: {
    50: '#856cde',
    500: '#3731ce',
    950: '#000000',
  },
}

SCSS

$custom: #3731ce;
$custom-light: #856cde;
$custom-dark: #000000;

JSON

{
  "hex": "#3731ce",
  "rgb": {
    "r": 55,
    "g": 49,
    "b": 206
  },
  "hsl": {
    "h": 242.293,
    "s": 61.569,
    "l": 50
  },
  "oklch": {
    "l": 0.44365,
    "c": 0.2288,
    "h": 273.5
  },
  "luminance": 0.07465
}

Semantic roles & 50–950 ramp

primary

#3731CE

secondary

#CED18A

accent

#E543DE

background

#F9F6FD

surface

#F1EBFB

border

#CBC6D4

text

#0D0715

muted

#7E7A83

Preview Lab

Preview with #3731CE

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

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