#3866D3#3866D3

#3866D3 is a mid, vivid blue. Relative luminance 0.150; OKLCH L 54.0% C 0.176 H 264.1°. Best body text is #FFFFFF at 5.24:1 contrast (WCAG AA passes).

Color values

HEX	#3866D3
RGB	rgb(56, 102, 211)
HSL	hsl(222, 64%, 52%)
HSV	hsv(222, 73%, 83%)
CMYK	cmyk(73.5%, 51.7%, 0%, 17.3%)
CIE-LAB	lab(45.70, 21.92, -60.78)
CIE-LCH	lch(45.70, 64.61, 289.84°)
OKLab	oklab(53.96% -0.018 -0.1749)
OKLCH	oklch(53.96% 0.176 264.1)
XYZ	xyz(18.1360, 15.0447, 63.5635)
Luminance	0.1505 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3866D3 #D3A538

analogous

#38B3D3 #3866D3 #5838D3

triadic

#3866D3 #D33866 #66D338

tetradic

#3866D3 #D338B3 #D3A538 #38D358

square

#3866D3 #D338B3 #D3A538 #38D358

split-complementary

#3866D3 #D35838 #B3D338

monochromatic

#1A3676 #254CA9 #3866D3 #6A8DDE #9CB3E9

Accessibility & contrast

On white

5.24

#3866D3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.01

#3866D3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3866D3

5.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3866D3	#FFFFFF	#000000	##FFFFFF
##3866D3	1.00	5.24	4.01	5.24
#FFFFFF	5.24	1.00	21.00	1.00
#000000	4.01	21.00	1.00	21.00
##FFFFFF	5.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D74D7

Deuteranopia (green-blind)

#0065D1

Tritanopia (blue-blind)

#008093

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #3866d3;
/* rgb */ color: rgb(56, 102, 211);
/* oklch */ color: oklch(54.0% 0.176 264.1);

Tailwind

colors: {
  custom: {
    50: '#8391e1',
    500: '#3866d3',
    950: '#000000',
  },
}

SCSS

$custom: #3866d3;
$custom-light: #8391e1;
$custom-dark: #000000;

JSON

{
  "hex": "#3866d3",
  "rgb": {
    "r": 56,
    "g": 102,
    "b": 211
  },
  "hsl": {
    "h": 222.194,
    "s": 63.786,
    "l": 52.353
  },
  "oklch": {
    "l": 0.53958,
    "c": 0.1758,
    "h": 264.1
  },
  "luminance": 0.15047
}

Semantic roles & 50–950 ramp

primary

#3866D3

secondary

#D5C192

accent

#B641E7

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3866D3

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

Preview Lab → · Contrast checker → · Palette generator →