#3F6CD0#3F6CD0

#3F6CD0 is a mid, vivid blue. Relative luminance 0.163; OKLCH L 55.3% C 0.162 H 263.7°. Best body text is #FFFFFF at 4.92:1 contrast (WCAG AA passes).

Color values

HEX	#3F6CD0
RGB	rgb(63, 108, 208)
HSL	hsl(221, 61%, 53%)
HSV	hsv(221, 70%, 82%)
CMYK	cmyk(69.7%, 48.1%, 0%, 18.4%)
CIE-LAB	lab(47.41, 17.97, -56.29)
CIE-LCH	lch(47.41, 59.09, 287.71°)
OKLab	oklab(55.28% -0.0178 -0.1614)
OKLCH	oklch(55.28% 0.162 263.7)
XYZ	xyz(18.7936, 16.3340, 61.8246)
Luminance	0.1634 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F6CD0 #D0A33F

analogous

#3FB5D0 #3F6CD0 #5A3FD0

triadic

#3F6CD0 #D03F6C #6CD03F

tetradic

#3F6CD0 #D03FB5 #D0A33F #3FD05A

square

#3F6CD0 #D03FB5 #D0A33F #3FD05A

split-complementary

#3F6CD0 #D05A3F #B5D03F

monochromatic

#1D3977 #2951A9 #3F6CD0 #7092DC #A1B7E8

Accessibility & contrast

On white

4.92

#3F6CD0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.27

#3F6CD0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F6CD0

4.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F6CD0	#FFFFFF	#000000	##FFFFFF
##3F6CD0	1.00	4.92	4.27	4.92
#FFFFFF	4.92	1.00	21.00	1.00
#000000	4.27	21.00	1.00	21.00
##FFFFFF	4.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3578D4

Deuteranopia (green-blind)

#0C6ACE

Tritanopia (blue-blind)

#008394

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3f6cd0;
/* rgb */ color: rgb(63, 108, 208);
/* oklch */ color: oklch(55.3% 0.162 263.7);

Tailwind

colors: {
  custom: {
    50: '#8595df',
    500: '#3f6cd0',
    950: '#000000',
  },
}

SCSS

$custom: #3f6cd0;
$custom-light: #8595df;
$custom-dark: #000000;

JSON

{
  "hex": "#3f6cd0",
  "rgb": {
    "r": 63,
    "g": 108,
    "b": 208
  },
  "hsl": {
    "h": 221.379,
    "s": 60.669,
    "l": 53.137
  },
  "oklch": {
    "l": 0.5528,
    "c": 0.16242,
    "h": 263.7
  },
  "luminance": 0.16336
}

Semantic roles & 50–950 ramp

primary

#3F6CD0

secondary

#D5C196

accent

#B244E4

background

#F8F9FD

surface

#F0F1FB

border

#CBCBD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F6CD0

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

Preview Lab → · Contrast checker → · Palette generator →