#3F6ED8#3F6ED8

#3F6ED8 is a mid, vivid blue. Relative luminance 0.172; OKLCH L 56.3% C 0.171 H 263.8°. Best body text is #FFFFFF at 4.74:1 contrast (WCAG AA passes).

Color values

HEX	#3F6ED8
RGB	rgb(63, 110, 216)
HSL	hsl(222, 66%, 55%)
HSV	hsv(222, 71%, 85%)
CMYK	cmyk(70.8%, 49.1%, 0%, 15.3%)
CIE-LAB	lab(48.47, 19.60, -59.14)
CIE-LCH	lch(48.47, 62.30, 288.34°)
OKLab	oklab(56.25% -0.0185 -0.1698)
OKLCH	oklch(56.25% 0.171 263.8)
XYZ	xyz(20.0161, 17.1644, 67.2106)
Luminance	0.1717 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F6ED8 #D8A93F

analogous

#3FBAD8 #3F6ED8 #5D3FD8

triadic

#3F6ED8 #D83F6E #6ED83F

tetradic

#3F6ED8 #D83FBA #D8A93F #3FD85D

square

#3F6ED8 #D83FBA #D8A93F #3FD85D

split-complementary

#3F6ED8 #D85D3F #BAD83F

monochromatic

#1A3A82 #2551B5 #3F6ED8 #7294E2 #A5BBED

Accessibility & contrast

On white

4.74

#3F6ED8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.43

#3F6ED8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F6ED8

4.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F6ED8	#FFFFFF	#000000	##FFFFFF
##3F6ED8	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)

#317BDC

Deuteranopia (green-blind)

#006CD6

Tritanopia (blue-blind)

#008799

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3f6ed8;
/* rgb */ color: rgb(63, 110, 216);
/* oklch */ color: oklch(56.3% 0.171 263.8);

Tailwind

colors: {
  custom: {
    50: '#8697e5',
    500: '#3f6ed8',
    950: '#000000',
  },
}

SCSS

$custom: #3f6ed8;
$custom-light: #8697e5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f6ed8",
  "rgb": {
    "r": 63,
    "g": 110,
    "b": 216
  },
  "hsl": {
    "h": 221.569,
    "s": 66.234,
    "l": 54.706
  },
  "oklch": {
    "l": 0.56252,
    "c": 0.1708,
    "h": 263.8
  },
  "luminance": 0.17166
}

Semantic roles & 50–950 ramp

primary

#3F6ED8

secondary

#DAC699

accent

#B53FE9

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0D0D16

muted

#7D7E84

Preview Lab

Preview with #3F6ED8

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

Preview Lab → · Contrast checker → · Palette generator →