#3866CF#3866CF

#3866CF is a mid, vivid blue. Relative luminance 0.148; OKLCH L 53.7% C 0.170 H 263.8°. Best body text is #FFFFFF at 5.29:1 contrast (WCAG AA passes).

Color values

HEX	#3866CF
RGB	rgb(56, 102, 207)
HSL	hsl(222, 61%, 52%)
HSV	hsv(222, 73%, 81%)
CMYK	cmyk(72.9%, 50.7%, 0%, 18.8%)
CIE-LAB	lab(45.42, 20.45, -58.93)
CIE-LCH	lch(45.42, 62.38, 289.14°)
OKLab	oklab(53.66% -0.0184 -0.1694)
OKLCH	oklch(53.66% 0.17 263.8)
XYZ	xyz(17.6407, 14.8466, 60.9554)
Luminance	0.1485 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3866CF #CFA138

analogous

#38B2CF #3866CF #5638CF

triadic

#3866CF #CF3866 #66CF38

tetradic

#3866CF #CF38B2 #CFA138 #38CF56

square

#3866CF #CF38B2 #CFA138 #38CF56

split-complementary

#3866CF #CF5638 #B2CF38

monochromatic

#1B3671 #274DA3 #3866CF #698CDB #9BB2E7

Accessibility & contrast

On white

5.29

#3866CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.97

#3866CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3866CF

5.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3866CF	#FFFFFF	#000000	##FFFFFF
##3866CF	1.00	5.29	3.97	5.29
#FFFFFF	5.29	1.00	21.00	1.00
#000000	3.97	21.00	1.00	21.00
##FFFFFF	5.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2473D3

Deuteranopia (green-blind)

#0065CD

Tritanopia (blue-blind)

#007F91

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #3866cf;
/* rgb */ color: rgb(56, 102, 207);
/* oklch */ color: oklch(53.7% 0.170 263.8);

Tailwind

colors: {
  custom: {
    50: '#8291de',
    500: '#3866cf',
    950: '#000000',
  },
}

SCSS

$custom: #3866cf;
$custom-light: #8291de;
$custom-dark: #000000;

JSON

{
  "hex": "#3866cf",
  "rgb": {
    "r": 56,
    "g": 102,
    "b": 207
  },
  "hsl": {
    "h": 221.722,
    "s": 61.134,
    "l": 51.569
  },
  "oklch": {
    "l": 0.53664,
    "c": 0.17044,
    "h": 263.8
  },
  "luminance": 0.14848
}

Semantic roles & 50–950 ramp

primary

#3866CF

secondary

#D3BE90

accent

#B344E4

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3866CF

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

Preview Lab → · Contrast checker → · Palette generator →