#3F72D3#3F72D3

#3F72D3 is a mid, vivid blue. Relative luminance 0.178; OKLCH L 56.7% C 0.159 H 261.8°. Best body text is #FFFFFF at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#3F72D3
RGB	rgb(63, 114, 211)
HSL	hsl(219, 63%, 54%)
HSV	hsv(219, 70%, 83%)
CMYK	cmyk(70.1%, 46%, 0%, 17.3%)
CIE-LAB	lab(49.24, 15.28, -55.05)
CIE-LCH	lch(49.24, 57.13, 285.52°)
OKLab	oklab(56.75% -0.0226 -0.1577)
OKLCH	oklch(56.75% 0.159 261.8)
XYZ	xyz(19.8209, 17.7925, 64.0051)
Luminance	0.1779 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F72D3 #D3A03F

analogous

#3FBCD3 #3F72D3 #563FD3

triadic

#3F72D3 #D33F72 #72D33F

tetradic

#3F72D3 #D33FBC #D3A03F #3FD356

square

#3F72D3 #D33FBC #D3A03F #3FD356

split-complementary

#3F72D3 #D3563F #BCD33F

monochromatic

#1C3D7B #2856AD #3F72D3 #7197DE #A3BBEA

Accessibility & contrast

On white

4.61

#3F72D3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.56

#3F72D3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F72D3

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F72D3	#FFFFFF	#000000	##FFFFFF
##3F72D3	1.00	4.61	4.56	4.61
#FFFFFF	4.61	1.00	21.00	1.00
#000000	4.56	21.00	1.00	21.00
##FFFFFF	4.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#407CD7

Deuteranopia (green-blind)

#206FD1

Tritanopia (blue-blind)

#008998

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3f72d3;
/* rgb */ color: rgb(63, 114, 211);
/* oklch */ color: oklch(56.7% 0.159 261.8);

Tailwind

colors: {
  custom: {
    50: '#859ae1',
    500: '#3f72d3',
    950: '#000000',
  },
}

SCSS

$custom: #3f72d3;
$custom-light: #859ae1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f72d3",
  "rgb": {
    "r": 63,
    "g": 114,
    "b": 211
  },
  "hsl": {
    "h": 219.324,
    "s": 62.712,
    "l": 53.725
  },
  "oklch": {
    "l": 0.56746,
    "c": 0.15932,
    "h": 261.8
  },
  "luminance": 0.17795
}

Semantic roles & 50–950 ramp

primary

#3F72D3

secondary

#D7C197

accent

#AD42E6

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F72D3

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

Preview Lab → · Contrast checker → · Palette generator →