#3F72E8#3F72E8

#3F72E8 is a mid, vivid blue. Relative luminance 0.189; OKLCH L 58.2% C 0.187 H 263.9°. Best body text is #000000 at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#3F72E8
RGB	rgb(63, 114, 232)
HSL	hsl(222, 79%, 58%)
HSV	hsv(222, 73%, 91%)
CMYK	cmyk(72.8%, 50.9%, 0%, 9%)
CIE-LAB	lab(50.59, 22.87, -64.75)
CIE-LCH	lch(50.59, 68.67, 289.45°)
OKLab	oklab(58.2% -0.0199 -0.1862)
OKLCH	oklch(58.2% 0.187 263.9)
XYZ	xyz(22.6275, 18.9151, 78.7867)
Luminance	0.1892 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F72E8 #E8B53F

analogous

#3FC7E8 #3F72E8 #603FE8

triadic

#3F72E8 #E83F72 #72E83F

tetradic

#3F72E8 #E83FC7 #E8B53F #3FE860

square

#3F72E8 #E83FC7 #E8B53F #3FE860

split-complementary

#3F72E8 #E8603F #C7E83F

monochromatic

#123B9A #1950D1 #3F72E8 #769AEF #ACC2F5

Accessibility & contrast

On white

4.39

#3F72E8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.78

#3F72E8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F72E8

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F72E8	#FFFFFF	#000000	##000000
##3F72E8	1.00	4.39	4.78	4.78
#FFFFFF	4.39	1.00	21.00	21.00
#000000	4.78	21.00	1.00	1.00
##000000	4.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2681EC

Deuteranopia (green-blind)

#0071E6

Tritanopia (blue-blind)

#008EA2

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #3f72e8;
/* rgb */ color: rgb(63, 114, 232);
/* oklch */ color: oklch(58.2% 0.187 263.9);

Tailwind

colors: {
  custom: {
    50: '#8999f0',
    500: '#3f72e8',
    950: '#000000',
  },
}

SCSS

$custom: #3f72e8;
$custom-light: #8999f0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f72e8",
  "rgb": {
    "r": 63,
    "g": 114,
    "b": 232
  },
  "hsl": {
    "h": 221.893,
    "s": 78.605,
    "l": 57.843
  },
  "oklch": {
    "l": 0.58204,
    "c": 0.18729,
    "h": 263.9
  },
  "luminance": 0.18918
}

Semantic roles & 50–950 ramp

primary

#3F72E8

secondary

#E3CFA0

accent

#BA33F5

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0D17

muted

#7E7E85

Preview Lab

Preview with #3F72E8

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

Preview Lab → · Contrast checker → · Palette generator →