#3F72DF#3F72DF

#3F72DF is a mid, vivid blue. Relative luminance 0.184; OKLCH L 57.6% C 0.175 H 263.1°. Best body text is #000000 at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#3F72DF
RGB	rgb(63, 114, 223)
HSL	hsl(221, 71%, 56%)
HSV	hsv(221, 72%, 87%)
CMYK	cmyk(71.7%, 48.9%, 0%, 12.5%)
CIE-LAB	lab(50.00, 19.62, -60.64)
CIE-LCH	lch(50.00, 63.73, 287.93°)
OKLab	oklab(57.57% -0.0209 -0.1741)
OKLCH	oklch(57.57% 0.175 263.1)
XYZ	xyz(21.3818, 18.4168, 72.2257)
Luminance	0.1842 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F72DF #DFAC3F

analogous

#3FC2DF #3F72DF #5C3FDF

triadic

#3F72DF #DF3F72 #72DF3F

tetradic

#3F72DF #DF3FC2 #DFAC3F #3FDF5C

square

#3F72DF #DF3FC2 #DFAC3F #3FDF5C

split-complementary

#3F72DF #DF5C3F #C2DF3F

monochromatic

#173D8C #2053C1 #3F72DF #7399E8 #A8BFF0

Accessibility & contrast

On white

4.48

#3F72DF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.68

#3F72DF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F72DF

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F72DF	#FFFFFF	#000000	##000000
##3F72DF	1.00	4.48	4.68	4.68
#FFFFFF	4.48	1.00	21.00	21.00
#000000	4.68	21.00	1.00	1.00
##000000	4.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#337FE3

Deuteranopia (green-blind)

#0070DD

Tritanopia (blue-blind)

#008C9E

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3f72df;
/* rgb */ color: rgb(63, 114, 223);
/* oklch */ color: oklch(57.6% 0.175 263.1);

Tailwind

colors: {
  custom: {
    50: '#8799ea',
    500: '#3f72df',
    950: '#000000',
  },
}

SCSS

$custom: #3f72df;
$custom-light: #8799ea;
$custom-dark: #000000;

JSON

{
  "hex": "#3f72df",
  "rgb": {
    "r": 63,
    "g": 114,
    "b": 223
  },
  "hsl": {
    "h": 220.875,
    "s": 71.429,
    "l": 56.078
  },
  "oklch": {
    "l": 0.57566,
    "c": 0.17538,
    "h": 263.1
  },
  "luminance": 0.18419
}

Semantic roles & 50–950 ramp

primary

#3F72DF

secondary

#DEC99C

accent

#B53AEE

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0D16

muted

#7E7E84

Preview Lab

Preview with #3F72DF

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

Preview Lab → · Contrast checker → · Palette generator →