#3866CE#3866CE

#3866CE is a mid, vivid blue. Relative luminance 0.148; OKLCH L 53.6% C 0.169 H 263.7°. Best body text is #FFFFFF at 5.30:1 contrast (WCAG AA passes).

Color values

HEX	#3866CE
RGB	rgb(56, 102, 206)
HSL	hsl(222, 60%, 51%)
HSV	hsv(222, 73%, 81%)
CMYK	cmyk(72.8%, 50.5%, 0%, 19.2%)
CIE-LAB	lab(45.36, 20.09, -58.47)
CIE-LCH	lch(45.36, 61.82, 288.96°)
OKLab	oklab(53.59% -0.0185 -0.1681)
OKLCH	oklch(53.59% 0.169 263.7)
XYZ	xyz(17.5189, 14.7978, 60.3135)
Luminance	0.1480 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3866CE #CEA038

analogous

#38B1CE #3866CE #5538CE

triadic

#3866CE #CE3866 #66CE38

tetradic

#3866CE #CE38B1 #CEA038 #38CE55

square

#3866CE #CE38B1 #CEA038 #38CE55

split-complementary

#3866CE #CE5538 #B1CE38

monochromatic

#1C3570 #284DA1 #3866CE #698CDA #9AB2E6

Accessibility & contrast

On white

5.30

#3866CE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.96

#3866CE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3866CE

5.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3866CE	#FFFFFF	#000000	##FFFFFF
##3866CE	1.00	5.30	3.96	5.30
#FFFFFF	5.30	1.00	21.00	1.00
#000000	3.96	21.00	1.00	21.00
##FFFFFF	5.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2673D2

Deuteranopia (green-blind)

#0065CC

Tritanopia (blue-blind)

#007F90

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #3866ce;
/* rgb */ color: rgb(56, 102, 206);
/* oklch */ color: oklch(53.6% 0.169 263.7);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#3866ce",
  "rgb": {
    "r": 56,
    "g": 102,
    "b": 206
  },
  "hsl": {
    "h": 221.6,
    "s": 60.484,
    "l": 51.373
  },
  "oklch": {
    "l": 0.53591,
    "c": 0.16909,
    "h": 263.7
  },
  "luminance": 0.148
}

Semantic roles & 50–950 ramp

primary

#3866CE

secondary

#D2BE90

accent

#B344E4

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3866CE

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

Preview Lab → · Contrast checker → · Palette generator →