#3747C7#3747C7

#3747C7 is a mid, vivid blue. Relative luminance 0.094; OKLCH L 47.0% C 0.197 H 271.0°. Best body text is #FFFFFF at 7.27:1 contrast (WCAG AA passes).

Color values

HEX	#3747C7
RGB	rgb(55, 71, 199)
HSL	hsl(233, 57%, 50%)
HSV	hsv(233, 72%, 78%)
CMYK	cmyk(72.4%, 64.3%, 0%, 22%)
CIE-LAB	lab(36.82, 37.23, -68.31)
CIE-LCH	lch(36.82, 77.79, 298.59°)
OKLab	oklab(47.02% 0.0033 -0.1974)
OKLCH	oklch(47.02% 0.197 271)
XYZ	xyz(14.1341, 9.4408, 55.0991)
Luminance	0.0944 (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

#3747C7 #C7B737

analogous

#378FC7 #3747C7 #6F37C7

triadic

#3747C7 #C73747 #47C737

tetradic

#3747C7 #C7378F #C7B737 #37C76F

square

#3747C7 #C7378F #C7B737 #37C76F

split-complementary

#3747C7 #C76F37 #8FC737

monochromatic

#1C2567 #2A3697 #3747C7 #6673D5 #969FE2

Accessibility & contrast

On white

7.27

#3747C7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.89

#3747C7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3747C7

7.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3747C7	#FFFFFF	#000000	##FFFFFF
##3747C7	1.00	7.27	2.89	7.27
#FFFFFF	7.27	1.00	21.00	1.00
#000000	2.89	21.00	1.00	21.00
##FFFFFF	7.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DCB

Deuteranopia (green-blind)

#0050C5

Tritanopia (blue-blind)

#006980

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3747c7;
/* rgb */ color: rgb(55, 71, 199);
/* oklch */ color: oklch(47.0% 0.197 271.0);

Tailwind

colors: {
  custom: {
    50: '#827ad9',
    500: '#3747c7',
    950: '#000000',
  },
}

SCSS

$custom: #3747c7;
$custom-light: #827ad9;
$custom-dark: #000000;

JSON

{
  "hex": "#3747c7",
  "rgb": {
    "r": 55,
    "g": 71,
    "b": 199
  },
  "hsl": {
    "h": 233.333,
    "s": 56.693,
    "l": 49.804
  },
  "oklch": {
    "l": 0.47024,
    "c": 0.19745,
    "h": 271
  },
  "luminance": 0.09442
}

Semantic roles & 50–950 ramp

primary

#3747C7

secondary

#CDC68C

accent

#CF48E0

background

#F8F7FD

surface

#F0EDFB

border

#CBC8D4

text

#0C0915

muted

#7D7B83

Preview Lab

Preview with #3747C7

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

Preview Lab → · Contrast checker → · Palette generator →