#3F72C8#3F72C8

#3F72C8 is a mid, vivid blue. Relative luminance 0.173; OKLCH L 56.0% C 0.144 H 260.2°. Best body text is #FFFFFF at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#3F72C8
RGB	rgb(63, 114, 200)
HSL	hsl(218, 55%, 52%)
HSV	hsv(218, 69%, 78%)
CMYK	cmyk(68.5%, 43%, 0%, 21.6%)
CIE-LAB	lab(48.59, 11.32, -49.82)
CIE-LCH	lch(48.59, 51.09, 282.80°)
OKLab	oklab(56.03% -0.0246 -0.1423)
OKLCH	oklch(56.03% 0.144 260.2)
XYZ	xyz(18.4888, 17.2596, 56.9894)
Luminance	0.1726 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F72C8 #C8953F

analogous

#3FB7C8 #3F72C8 #513FC8

triadic

#3F72C8 #C83F72 #72C83F

tetradic

#3F72C8 #C83FB7 #C8953F #3FC851

square

#3F72C8 #C83FB7 #C8953F #3FC851

split-complementary

#3F72C8 #C8513F #B7C83F

monochromatic

#1F3C6D #2D579D #3F72C8 #6F95D6 #9EB8E3

Accessibility & contrast

On white

4.72

#3F72C8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.45

#3F72C8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F72C8

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F72C8	#FFFFFF	#000000	##FFFFFF
##3F72C8	1.00	4.72	4.45	4.72
#FFFFFF	4.72	1.00	21.00	1.00
#000000	4.45	21.00	1.00	21.00
##FFFFFF	4.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#497ACB

Deuteranopia (green-blind)

#326EC6

Tritanopia (blue-blind)

#008693

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3f72c8;
/* rgb */ color: rgb(63, 114, 200);
/* oklch */ color: oklch(56.0% 0.144 260.2);

Tailwind

colors: {
  custom: {
    50: '#839ad9',
    500: '#3f72c8',
    950: '#000000',
  },
}

SCSS

$custom: #3f72c8;
$custom-light: #839ad9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f72c8",
  "rgb": {
    "r": 63,
    "g": 114,
    "b": 200
  },
  "hsl": {
    "h": 217.664,
    "s": 55.466,
    "l": 51.569
  },
  "oklch": {
    "l": 0.56027,
    "c": 0.14445,
    "h": 260.2
  },
  "luminance": 0.17262
}

Semantic roles & 50–950 ramp

primary

#3F72C8

secondary

#D0B993

accent

#A749DF

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F72C8

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

Preview Lab → · Contrast checker → · Palette generator →