#3F73D5#3F73D5

#3F73D5 is a mid, vivid blue. Relative luminance 0.181; OKLCH L 57.1% C 0.161 H 261.7°. Best body text is #000000 at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#3F73D5
RGB	rgb(63, 115, 213)
HSL	hsl(219, 64%, 54%)
HSV	hsv(219, 70%, 84%)
CMYK	cmyk(70.4%, 46%, 0%, 16.5%)
CIE-LAB	lab(49.64, 15.38, -55.55)
CIE-LCH	lch(49.64, 57.64, 285.48°)
OKLab	oklab(57.09% -0.0232 -0.1592)
OKLCH	oklch(57.09% 0.161 261.7)
XYZ	xyz(20.1866, 18.1202, 65.3716)
Luminance	0.1812 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F73D5 #D5A13F

analogous

#3FBED5 #3F73D5 #563FD5

triadic

#3F73D5 #D53F73 #73D53F

tetradic

#3F73D5 #D53FBE #D5A13F #3FD556

square

#3F73D5 #D53FBE #D5A13F #3FD556

split-complementary

#3F73D5 #D5563F #BED53F

monochromatic

#1C3E7E #2756B0 #3F73D5 #7198E0 #A3BCEB

Accessibility & contrast

On white

4.54

#3F73D5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.62

#3F73D5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F73D5

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F73D5	#FFFFFF	#000000	##000000
##3F73D5	1.00	4.54	4.62	4.62
#FFFFFF	4.54	1.00	21.00	21.00
#000000	4.62	21.00	1.00	1.00
##000000	4.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#407DD9

Deuteranopia (green-blind)

#2070D3

Tritanopia (blue-blind)

#008A9A

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3f73d5;
/* rgb */ color: rgb(63, 115, 213);
/* oklch */ color: oklch(57.1% 0.161 261.7);

Tailwind

colors: {
  custom: {
    50: '#869ae2',
    500: '#3f73d5',
    950: '#000000',
  },
}

SCSS

$custom: #3f73d5;
$custom-light: #869ae2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f73d5",
  "rgb": {
    "r": 63,
    "g": 115,
    "b": 213
  },
  "hsl": {
    "h": 219.2,
    "s": 64.103,
    "l": 54.118
  },
  "oklch": {
    "l": 0.57091,
    "c": 0.16083,
    "h": 261.7
  },
  "luminance": 0.18122
}

Semantic roles & 50–950 ramp

primary

#3F73D5

secondary

#D8C298

accent

#AD41E7

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F73D5

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

Preview Lab → · Contrast checker → · Palette generator →