#3F6DD3#3F6DD3

#3F6DD3 is a mid, vivid blue. Relative luminance 0.167; OKLCH L 55.7% C 0.165 H 263.7°. Best body text is #FFFFFF at 4.84:1 contrast (WCAG AA passes).

Color values

HEX	#3F6DD3
RGB	rgb(63, 109, 211)
HSL	hsl(221, 63%, 54%)
HSV	hsv(221, 70%, 83%)
CMYK	cmyk(70.1%, 48.3%, 0%, 17.3%)
CIE-LAB	lab(47.87, 18.43, -57.25)
CIE-LCH	lch(47.87, 60.14, 287.84°)
OKLab	oklab(55.7% -0.0182 -0.1643)
OKLCH	oklch(55.7% 0.165 263.7)
XYZ	xyz(19.2723, 16.6952, 63.8222)
Luminance	0.1670 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F6DD3 #D3A53F

analogous

#3FB7D3 #3F6DD3 #5B3FD3

triadic

#3F6DD3 #D33F6D #6DD33F

tetradic

#3F6DD3 #D33FB7 #D3A53F #3FD35B

square

#3F6DD3 #D33FB7 #D3A53F #3FD35B

split-complementary

#3F6DD3 #D35B3F #B7D33F

monochromatic

#1C3A7B #2851AD #3F6DD3 #7193DE #A3B9EA

Accessibility & contrast

On white

4.84

#3F6DD3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.34

#3F6DD3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F6DD3

4.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F6DD3	#FFFFFF	#000000	##FFFFFF
##3F6DD3	1.00	4.84	4.34	4.84
#FFFFFF	4.84	1.00	21.00	1.00
#000000	4.34	21.00	1.00	21.00
##FFFFFF	4.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3579D7

Deuteranopia (green-blind)

#056BD1

Tritanopia (blue-blind)

#008596

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3f6dd3;
/* rgb */ color: rgb(63, 109, 211);
/* oklch */ color: oklch(55.7% 0.165 263.7);

Tailwind

colors: {
  custom: {
    50: '#8596e1',
    500: '#3f6dd3',
    950: '#000000',
  },
}

SCSS

$custom: #3f6dd3;
$custom-light: #8596e1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f6dd3",
  "rgb": {
    "r": 63,
    "g": 109,
    "b": 211
  },
  "hsl": {
    "h": 221.351,
    "s": 62.712,
    "l": 53.725
  },
  "oklch": {
    "l": 0.55696,
    "c": 0.16527,
    "h": 263.7
  },
  "luminance": 0.16697
}

Semantic roles & 50–950 ramp

primary

#3F6DD3

secondary

#D7C397

accent

#B342E6

background

#F8F9FD

surface

#F0F1FB

border

#CBCBD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F6DD3

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

Preview Lab → · Contrast checker → · Palette generator →