#3F6CD3#3F6CD3

#3F6CD3 is a mid, vivid blue. Relative luminance 0.165; OKLCH L 55.5% C 0.166 H 264.0°. Best body text is #FFFFFF at 4.89:1 contrast (WCAG AA passes).

Color values

HEX	#3F6CD3
RGB	rgb(63, 108, 211)
HSL	hsl(222, 63%, 54%)
HSV	hsv(222, 70%, 83%)
CMYK	cmyk(70.1%, 48.8%, 0%, 17.3%)
CIE-LAB	lab(47.60, 19.06, -57.69)
CIE-LCH	lch(47.60, 60.76, 288.28°)
OKLab	oklab(55.49% -0.0174 -0.1656)
OKLCH	oklch(55.49% 0.166 264)
XYZ	xyz(19.1662, 16.4831, 63.7868)
Luminance	0.1648 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F6CD3 #D3A63F

analogous

#3FB6D3 #3F6CD3 #5C3FD3

triadic

#3F6CD3 #D33F6C #6CD33F

tetradic

#3F6CD3 #D33FB6 #D3A63F #3FD35C

square

#3F6CD3 #D33FB6 #D3A63F #3FD35C

split-complementary

#3F6CD3 #D35C3F #B6D33F

monochromatic

#1C397B #2850AD #3F6CD3 #7192DE #A3B8EA

Accessibility & contrast

On white

4.89

#3F6CD3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.30

#3F6CD3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F6CD3

4.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F6CD3	#FFFFFF	#000000	##FFFFFF
##3F6CD3	1.00	4.89	4.30	4.89
#FFFFFF	4.89	1.00	21.00	1.00
#000000	4.30	21.00	1.00	21.00
##FFFFFF	4.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3278D7

Deuteranopia (green-blind)

#006BD1

Tritanopia (blue-blind)

#008495

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3f6cd3;
/* rgb */ color: rgb(63, 108, 211);
/* oklch */ color: oklch(55.5% 0.166 264.0);

Tailwind

colors: {
  custom: {
    50: '#8595e1',
    500: '#3f6cd3',
    950: '#000000',
  },
}

SCSS

$custom: #3f6cd3;
$custom-light: #8595e1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f6cd3",
  "rgb": {
    "r": 63,
    "g": 108,
    "b": 211
  },
  "hsl": {
    "h": 221.757,
    "s": 62.712,
    "l": 53.725
  },
  "oklch": {
    "l": 0.55489,
    "c": 0.16647,
    "h": 264
  },
  "luminance": 0.16485
}

Semantic roles & 50–950 ramp

primary

#3F6CD3

secondary

#D7C397

accent

#B442E6

background

#F8F9FD

surface

#F0F1FB

border

#CBCBD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F6CD3

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

Preview Lab → · Contrast checker → · Palette generator →