#3F6FD5#3F6FD5

#3F6FD5 is a mid, vivid blue. Relative luminance 0.172; OKLCH L 56.3% C 0.166 H 263.2°. Best body text is #FFFFFF at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#3F6FD5
RGB	rgb(63, 111, 213)
HSL	hsl(221, 64%, 54%)
HSV	hsv(221, 70%, 84%)
CMYK	cmyk(70.4%, 47.9%, 0%, 16.5%)
CIE-LAB	lab(48.55, 17.89, -57.31)
CIE-LCH	lch(48.55, 60.04, 287.34°)
OKLab	oklab(56.25% -0.0197 -0.1644)
OKLCH	oklch(56.25% 0.166 263.2)
XYZ	xyz(19.7403, 17.2277, 65.2228)
Luminance	0.1723 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F6FD5 #D5A53F

analogous

#3FBAD5 #3F6FD5 #5A3FD5

triadic

#3F6FD5 #D53F6F #6FD53F

tetradic

#3F6FD5 #D53FBA #D5A53F #3FD55A

square

#3F6FD5 #D53FBA #D5A53F #3FD55A

split-complementary

#3F6FD5 #D55A3F #BAD53F

monochromatic

#1C3B7E #2753B0 #3F6FD5 #7195E0 #A3BAEB

Accessibility & contrast

On white

4.72

#3F6FD5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.45

#3F6FD5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F6FD5

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F6FD5	#FFFFFF	#000000	##FFFFFF
##3F6FD5	1.00	4.72	4.45	4.72
#FFFFFF	4.72	1.00	21.00	1.00
#000000	4.45	21.00	1.00	21.00
##FFFFFF	4.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#377BD9

Deuteranopia (green-blind)

#0B6DD3

Tritanopia (blue-blind)

#008798

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3f6fd5;
/* rgb */ color: rgb(63, 111, 213);
/* oklch */ color: oklch(56.3% 0.166 263.2);

Tailwind

colors: {
  custom: {
    50: '#8697e2',
    500: '#3f6fd5',
    950: '#000000',
  },
}

SCSS

$custom: #3f6fd5;
$custom-light: #8697e2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f6fd5",
  "rgb": {
    "r": 63,
    "g": 111,
    "b": 213
  },
  "hsl": {
    "h": 220.8,
    "s": 64.103,
    "l": 54.118
  },
  "oklch": {
    "l": 0.56251,
    "c": 0.16557,
    "h": 263.2
  },
  "luminance": 0.1723
}

Semantic roles & 50–950 ramp

primary

#3F6FD5

secondary

#D8C398

accent

#B241E7

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F6FD5

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

Preview Lab → · Contrast checker → · Palette generator →