#3866C4#3866C4

#3866C4 is a mid, vivid blue. Relative luminance 0.143; OKLCH L 52.9% C 0.156 H 262.7°. Best body text is #FFFFFF at 5.43:1 contrast (WCAG AA passes).

Color values

HEX	#3866C4
RGB	rgb(56, 102, 196)
HSL	hsl(220, 56%, 49%)
HSV	hsv(220, 71%, 77%)
CMYK	cmyk(71.4%, 48%, 0%, 23.1%)
CIE-LAB	lab(44.70, 16.40, -53.77)
CIE-LCH	lch(44.70, 56.22, 286.96°)
OKLab	oklab(52.88% -0.0198 -0.1543)
OKLCH	oklch(52.88% 0.156 262.7)
XYZ	xyz(16.3425, 14.3273, 54.1180)
Luminance	0.1433 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3866C4 #C49638

analogous

#38ACC4 #3866C4 #5038C4

triadic

#3866C4 #C43866 #66C438

tetradic

#3866C4 #C438AC #C49638 #38C450

square

#3866C4 #C438AC #C49638 #38C450

split-complementary

#3866C4 #C45038 #ACC438

monochromatic

#1D3465 #2A4D94 #3866C4 #668AD3 #96AEE1

Accessibility & contrast

On white

5.43

#3866C4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.87

#3866C4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3866C4

5.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3866C4	#FFFFFF	#000000	##FFFFFF
##3866C4	1.00	5.43	3.87	5.43
#FFFFFF	5.43	1.00	21.00	1.00
#000000	3.87	21.00	1.00	21.00
##FFFFFF	5.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3371C7

Deuteranopia (green-blind)

#0A64C2

Tritanopia (blue-blind)

#007C8B

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3866c4;
/* rgb */ color: rgb(56, 102, 196);
/* oklch */ color: oklch(52.9% 0.156 262.7);

Tailwind

colors: {
  custom: {
    50: '#8091d6',
    500: '#3866c4',
    950: '#000000',
  },
}

SCSS

$custom: #3866c4;
$custom-light: #8091d6;
$custom-dark: #000000;

JSON

{
  "hex": "#3866c4",
  "rgb": {
    "r": 56,
    "g": 102,
    "b": 196
  },
  "hsl": {
    "h": 220.286,
    "s": 55.556,
    "l": 49.412
  },
  "oklch": {
    "l": 0.52879,
    "c": 0.15553,
    "h": 262.7
  },
  "luminance": 0.14329
}

Semantic roles & 50–950 ramp

primary

#3866C4

secondary

#CCB78C

accent

#AE49DF

background

#F8F8FD

surface

#F0F0FA

border

#CBCBD3

text

#0B0C14

muted

#7C7D83

Preview Lab

Preview with #3866C4

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

Preview Lab → · Contrast checker → · Palette generator →