#3F72DD#3F72DD

#3F72DD is a mid, vivid blue. Relative luminance 0.183; OKLCH L 57.4% C 0.173 H 263.0°. Best body text is #000000 at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#3F72DD
RGB	rgb(63, 114, 221)
HSL	hsl(221, 70%, 56%)
HSV	hsv(221, 71%, 87%)
CMYK	cmyk(71.5%, 48.4%, 0%, 13.3%)
CIE-LAB	lab(49.87, 18.90, -59.71)
CIE-LCH	lch(49.87, 62.63, 287.56°)
OKLab	oklab(57.43% -0.0212 -0.1714)
OKLCH	oklch(57.43% 0.173 263)
XYZ	xyz(21.1137, 18.3096, 70.8140)
Luminance	0.1831 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F72DD #DDAA3F

analogous

#3FC1DD #3F72DD #5B3FDD

triadic

#3F72DD #DD3F72 #72DD3F

tetradic

#3F72DD #DD3FC1 #DDAA3F #3FDD5B

square

#3F72DD #DD3FC1 #DDAA3F #3FDD5B

split-complementary

#3F72DD #DD5B3F #C1DD3F

monochromatic

#183D89 #2254BD #3F72DD #7398E6 #A7BEEF

Accessibility & contrast

On white

4.50

#3F72DD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.66

#3F72DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F72DD

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F72DD	#FFFFFF	#000000	##000000
##3F72DD	1.00	4.50	4.66	4.66
#FFFFFF	4.50	1.00	21.00	21.00
#000000	4.66	21.00	1.00	1.00
##000000	4.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#367EE1

Deuteranopia (green-blind)

#0070DB

Tritanopia (blue-blind)

#008B9D

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3f72dd;
/* rgb */ color: rgb(63, 114, 221);
/* oklch */ color: oklch(57.4% 0.173 263.0);

Tailwind

colors: {
  custom: {
    50: '#8799e8',
    500: '#3f72dd',
    950: '#000000',
  },
}

SCSS

$custom: #3f72dd;
$custom-light: #8799e8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f72dd",
  "rgb": {
    "r": 63,
    "g": 114,
    "b": 221
  },
  "hsl": {
    "h": 220.633,
    "s": 69.912,
    "l": 55.686
  },
  "oklch": {
    "l": 0.57427,
    "c": 0.17272,
    "h": 263
  },
  "luminance": 0.18312
}

Semantic roles & 50–950 ramp

primary

#3F72DD

secondary

#DDC89B

accent

#B33BED

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0D16

muted

#7E7E84

Preview Lab

Preview with #3F72DD

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

Preview Lab → · Contrast checker → · Palette generator →