#3F6FD3#3F6FD3

#3F6FD3 is a mid, vivid blue. Relative luminance 0.171; OKLCH L 56.1% C 0.163 H 262.9°. Best body text is #FFFFFF at 4.74:1 contrast (WCAG AA passes).

Color values

HEX	#3F6FD3
RGB	rgb(63, 111, 211)
HSL	hsl(221, 63%, 54%)
HSV	hsv(221, 70%, 83%)
CMYK	cmyk(70.1%, 47.4%, 0%, 17.3%)
CIE-LAB	lab(48.42, 17.17, -56.37)
CIE-LCH	lch(48.42, 58.93, 286.94°)
OKLab	oklab(56.11% -0.02 -0.1616)
OKLCH	oklch(56.11% 0.163 262.9)
XYZ	xyz(19.4880, 17.1268, 63.8941)
Luminance	0.1713 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F6FD3 #D3A33F

analogous

#3FB9D3 #3F6FD3 #593FD3

triadic

#3F6FD3 #D33F6F #6FD33F

tetradic

#3F6FD3 #D33FB9 #D3A33F #3FD359

square

#3F6FD3 #D33FB9 #D3A33F #3FD359

split-complementary

#3F6FD3 #D3593F #B9D33F

monochromatic

#1C3B7B #2853AD #3F6FD3 #7194DE #A3BAEA

Accessibility & contrast

On white

4.74

#3F6FD3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.43

#3F6FD3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F6FD3

4.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F6FD3	#FFFFFF	#000000	##FFFFFF
##3F6FD3	1.00	4.74	4.43	4.74
#FFFFFF	4.74	1.00	21.00	1.00
#000000	4.43	21.00	1.00	21.00
##FFFFFF	4.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#397AD7

Deuteranopia (green-blind)

#136DD1

Tritanopia (blue-blind)

#008697

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3f6fd3;
/* rgb */ color: rgb(63, 111, 211);
/* oklch */ color: oklch(56.1% 0.163 262.9);

Tailwind

colors: {
  custom: {
    50: '#8597e1',
    500: '#3f6fd3',
    950: '#000000',
  },
}

SCSS

$custom: #3f6fd3;
$custom-light: #8597e1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f6fd3",
  "rgb": {
    "r": 63,
    "g": 111,
    "b": 211
  },
  "hsl": {
    "h": 220.541,
    "s": 62.712,
    "l": 53.725
  },
  "oklch": {
    "l": 0.56114,
    "c": 0.16287,
    "h": 262.9
  },
  "luminance": 0.17129
}

Semantic roles & 50–950 ramp

primary

#3F6FD3

secondary

#D7C297

accent

#B142E6

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F6FD3

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

Preview Lab → · Contrast checker → · Palette generator →