#3747D8#3747D8

#3747D8 is a mid, highly saturated blue. Relative luminance 0.103; OKLCH L 48.6% C 0.219 H 270.5°. Best body text is #FFFFFF at 6.87:1 contrast (WCAG AA passes).

Color values

HEX	#3747D8
RGB	rgb(55, 71, 216)
HSL	hsl(234, 67%, 53%)
HSV	hsv(234, 75%, 85%)
CMYK	cmyk(74.5%, 67.1%, 0%, 15.3%)
CIE-LAB	lab(38.33, 43.15, -75.66)
CIE-LCH	lch(38.33, 87.09, 299.70°)
OKLab	oklab(48.59% 0.0021 -0.2189)
OKLCH	oklch(48.59% 0.219 270.5)
XYZ	xyz(16.2192, 10.2748, 66.0809)
Luminance	0.1028 (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

#3747D8 #D8C837

analogous

#3798D8 #3747D8 #7737D8

triadic

#3747D8 #D83747 #47D837

tetradic

#3747D8 #D83798 #D8C837 #37D877

square

#3747D8 #D83798 #D8C837 #37D877

split-complementary

#3747D8 #D87737 #98D837

monochromatic

#18227C #2230B0 #3747D8 #6A76E2 #9DA5EC

Accessibility & contrast

On white

6.87

#3747D8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.06

#3747D8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3747D8

6.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3747D8	#FFFFFF	#000000	##FFFFFF
##3747D8	1.00	6.87	3.06	6.87
#FFFFFF	6.87	1.00	21.00	1.00
#000000	3.06	21.00	1.00	21.00
##FFFFFF	6.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0062DC

Deuteranopia (green-blind)

#0053D5

Tritanopia (blue-blind)

#006E8A

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #3747d8;
/* rgb */ color: rgb(55, 71, 216);
/* oklch */ color: oklch(48.6% 0.219 270.5);

Tailwind

colors: {
  custom: {
    50: '#867ae5',
    500: '#3747d8',
    950: '#000000',
  },
}

SCSS

$custom: #3747d8;
$custom-light: #867ae5;
$custom-dark: #000000;

JSON

{
  "hex": "#3747d8",
  "rgb": {
    "r": 55,
    "g": 71,
    "b": 216
  },
  "hsl": {
    "h": 234.037,
    "s": 67.364,
    "l": 53.137
  },
  "oklch": {
    "l": 0.48588,
    "c": 0.21892,
    "h": 270.5
  },
  "luminance": 0.10277
}

Semantic roles & 50–950 ramp

primary

#3747D8

secondary

#D8D193

accent

#D93EEA

background

#F9F7FE

surface

#F1EDFC

border

#CBC8D5

text

#0D0916

muted

#7E7B84

Preview Lab

Preview with #3747D8

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

Preview Lab → · Contrast checker → · Palette generator →