#3731C8#3731C8

#3731C8 is a dark, highly saturated blue. Relative luminance 0.072; OKLCH L 43.7% C 0.222 H 274.0°. Best body text is #FFFFFF at 8.62:1 contrast (WCAG AA passes).

Color values

HEX	#3731C8
RGB	rgb(55, 49, 200)
HSL	hsl(242, 61%, 49%)
HSV	hsv(242, 76%, 78%)
CMYK	cmyk(72.5%, 75.5%, 0%, 21.6%)
CIE-LAB	lab(32.21, 50.45, -76.48)
CIE-LCH	lch(32.21, 91.62, 303.41°)
OKLab	oklab(43.73% 0.0153 -0.2212)
OKLCH	oklch(43.73% 0.222 274)
XYZ	xyz(13.0957, 7.1777, 55.3276)
Luminance	0.0718 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blurple

#5539CC

ΔE00 3.96

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3731C8 #C2C831

analogous

#3177C8 #3731C8 #8331C8

triadic

#3731C8 #C83731 #31C837

tetradic

#3731C8 #C83177 #C2C831 #31C883

square

#3731C8 #C83177 #C2C831 #31C883

split-complementary

#3731C8 #C88331 #77C831

monochromatic

#1C1966 #292597 #3731C8 #635FD8 #9390E4

Accessibility & contrast

On white

8.62

#3731C8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#3731C8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3731C8

8.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3731C8	#FFFFFF	#000000	##FFFFFF
##3731C8	1.00	8.62	2.44	8.62
#FFFFFF	8.62	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053CC

Deuteranopia (green-blind)

#0045C5

Tritanopia (blue-blind)

#005E7B

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3731c8;
/* rgb */ color: rgb(55, 49, 200);
/* oklch */ color: oklch(43.7% 0.222 274.0);

Tailwind

colors: {
  custom: {
    50: '#846cda',
    500: '#3731c8',
    950: '#000000',
  },
}

SCSS

$custom: #3731c8;
$custom-light: #846cda;
$custom-dark: #000000;

JSON

{
  "hex": "#3731c8",
  "rgb": {
    "r": 55,
    "g": 49,
    "b": 200
  },
  "hsl": {
    "h": 242.384,
    "s": 60.643,
    "l": 48.824
  },
  "oklch": {
    "l": 0.43734,
    "c": 0.22177,
    "h": 274
  },
  "luminance": 0.07179
}

Semantic roles & 50–950 ramp

primary

#3731C8

secondary

#CBCE86

accent

#E444DD

background

#F9F6FD

surface

#F1EBFB

border

#CBC6D4

text

#0D0715

muted

#7E7A83

Preview Lab

Preview with #3731C8

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

Preview Lab → · Contrast checker → · Palette generator →