#3F72DB#3F72DB

#3F72DB is a mid, vivid blue. Relative luminance 0.182; OKLCH L 57.3% C 0.170 H 262.8°. Best body text is #000000 at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#3F72DB
RGB	rgb(63, 114, 219)
HSL	hsl(220, 68%, 55%)
HSV	hsv(220, 71%, 86%)
CMYK	cmyk(71.2%, 47.9%, 0%, 14.1%)
CIE-LAB	lab(49.74, 18.17, -58.79)
CIE-LCH	lch(49.74, 61.53, 287.18°)
OKLab	oklab(57.29% -0.0214 -0.1687)
OKLCH	oklch(57.29% 0.17 262.8)
XYZ	xyz(20.8488, 18.2036, 69.4190)
Luminance	0.1821 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F72DB #DBA83F

analogous

#3FC0DB #3F72DB #5A3FDB

triadic

#3F72DB #DB3F72 #72DB3F

tetradic

#3F72DB #DB3FC0 #DBA83F #3FDB5A

square

#3F72DB #DB3FC0 #DBA83F #3FDB5A

split-complementary

#3F72DB #DB5A3F #C0DB3F

monochromatic

#193D86 #2354BA #3F72DB #7398E5 #A6BEEE

Accessibility & contrast

On white

4.52

#3F72DB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.64

#3F72DB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F72DB

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F72DB	#FFFFFF	#000000	##000000
##3F72DB	1.00	4.52	4.64	4.64
#FFFFFF	4.52	1.00	21.00	21.00
#000000	4.64	21.00	1.00	1.00
##000000	4.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#387EDF

Deuteranopia (green-blind)

#0570D9

Tritanopia (blue-blind)

#008B9C

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3f72db;
/* rgb */ color: rgb(63, 114, 219);
/* oklch */ color: oklch(57.3% 0.170 262.8);

Tailwind

colors: {
  custom: {
    50: '#8799e7',
    500: '#3f72db',
    950: '#000000',
  },
}

SCSS

$custom: #3f72db;
$custom-light: #8799e7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f72db",
  "rgb": {
    "r": 63,
    "g": 114,
    "b": 219
  },
  "hsl": {
    "h": 220.385,
    "s": 68.421,
    "l": 55.294
  },
  "oklch": {
    "l": 0.57289,
    "c": 0.17005,
    "h": 262.8
  },
  "luminance": 0.18206
}

Semantic roles & 50–950 ramp

primary

#3F72DB

secondary

#DCC69A

accent

#B23DEB

background

#F9F9FE

surface

#F1F2FC

border

#CBCCD5

text

#0D0D16

muted

#7E7E84

Preview Lab

Preview with #3F72DB

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

Preview Lab → · Contrast checker → · Palette generator →