#3F73D3#3F73D3

#3F73D3 is a mid, vivid blue. Relative luminance 0.180; OKLCH L 57.0% C 0.158 H 261.4°. Best body text is #000000 at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#3F73D3
RGB	rgb(63, 115, 211)
HSL	hsl(219, 63%, 54%)
HSV	hsv(219, 70%, 83%)
CMYK	cmyk(70.1%, 45.5%, 0%, 17.3%)
CIE-LAB	lab(49.52, 14.66, -54.61)
CIE-LCH	lch(49.52, 56.54, 285.03°)
OKLab	oklab(56.96% -0.0235 -0.1564)
OKLCH	oklch(56.96% 0.158 261.4)
XYZ	xyz(19.9343, 18.0193, 64.0429)
Luminance	0.1802 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F73D3 #D39F3F

analogous

#3FBDD3 #3F73D3 #553FD3

triadic

#3F73D3 #D33F73 #73D33F

tetradic

#3F73D3 #D33FBD #D39F3F #3FD355

square

#3F73D3 #D33FBD #D39F3F #3FD355

split-complementary

#3F73D3 #D3553F #BDD33F

monochromatic

#1C3E7B #2857AD #3F73D3 #7197DE #A3BCEA

Accessibility & contrast

On white

4.56

#3F73D3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.60

#3F73D3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F73D3

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F73D3	#FFFFFF	#000000	##000000
##3F73D3	1.00	4.56	4.60	4.60
#FFFFFF	4.56	1.00	21.00	21.00
#000000	4.60	21.00	1.00	1.00
##000000	4.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#427DD7

Deuteranopia (green-blind)

#246FD1

Tritanopia (blue-blind)

#008999

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3f73d3;
/* rgb */ color: rgb(63, 115, 211);
/* oklch */ color: oklch(57.0% 0.158 261.4);

Tailwind

colors: {
  custom: {
    50: '#859ae1',
    500: '#3f73d3',
    950: '#000000',
  },
}

SCSS

$custom: #3f73d3;
$custom-light: #859ae1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f73d3",
  "rgb": {
    "r": 63,
    "g": 115,
    "b": 211
  },
  "hsl": {
    "h": 218.919,
    "s": 62.712,
    "l": 53.725
  },
  "oklch": {
    "l": 0.56958,
    "c": 0.15814,
    "h": 261.4
  },
  "luminance": 0.18021
}

Semantic roles & 50–950 ramp

primary

#3F73D3

secondary

#D7C097

accent

#AC42E6

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F73D3

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

Preview Lab → · Contrast checker → · Palette generator →