#3731AE#3731AE

#3731AE is a dark, vivid blue. Relative luminance 0.061; OKLCH L 41.1% C 0.190 H 276.1°. Best body text is #FFFFFF at 9.49:1 contrast (WCAG AA passes).

Color values

HEX	#3731AE
RGB	rgb(55, 49, 174)
HSL	hsl(243, 56%, 44%)
HSV	hsv(243, 72%, 68%)
CMYK	cmyk(68.4%, 71.8%, 0%, 31.8%)
CIE-LAB	lab(29.57, 42.03, -65.45)
CIE-LCH	lch(29.57, 77.79, 302.71°)
OKLab	oklab(41.08% 0.0202 -0.1891)
OKLCH	oklch(41.08% 0.19 276.1)
XYZ	xyz(10.3113, 6.0639, 40.6632)
Luminance	0.0607 (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

#3731AE #A8AE31

analogous

#3169AE #3731AE #7531AE

triadic

#3731AE #AE3731 #31AE37

tetradic

#3731AE #AE3169 #A8AE31 #31AE75

square

#3731AE #AE3169 #A8AE31 #31AE75

split-complementary

#3731AE #AE7531 #69AE31

monochromatic

#19164E #28247E #3731AE #554FCD #837FDB

Accessibility & contrast

On white

9.49

#3731AE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#3731AE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3731AE

9.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3731AE	#FFFFFF	#000000	##FFFFFF
##3731AE	1.00	9.49	2.21	9.49
#FFFFFF	9.49	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BB2

Deuteranopia (green-blind)

#0040AC

Tritanopia (blue-blind)

#00546C

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #3731ae;
/* rgb */ color: rgb(55, 49, 174);
/* oklch */ color: oklch(41.1% 0.190 276.1);

Tailwind

colors: {
  custom: {
    50: '#7e6bc7',
    500: '#3731ae',
    950: '#000000',
  },
}

SCSS

$custom: #3731ae;
$custom-light: #7e6bc7;
$custom-dark: #000000;

JSON

{
  "hex": "#3731ae",
  "rgb": {
    "r": 55,
    "g": 49,
    "b": 174
  },
  "hsl": {
    "h": 242.88,
    "s": 56.054,
    "l": 43.725
  },
  "oklch": {
    "l": 0.41076,
    "c": 0.19019,
    "h": 276.1
  },
  "luminance": 0.06065
}

Semantic roles & 50–950 ramp

primary

#3731AE

secondary

#C0C477

accent

#DF48D8

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3731AE

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

Preview Lab → · Contrast checker → · Palette generator →