#3866D7#3866D7

#3866D7 is a mid, vivid blue. Relative luminance 0.152; OKLCH L 54.3% C 0.181 H 264.4°. Best body text is #FFFFFF at 5.19:1 contrast (WCAG AA passes).

Color values

HEX	#3866D7
RGB	rgb(56, 102, 215)
HSL	hsl(223, 67%, 53%)
HSV	hsv(223, 74%, 84%)
CMYK	cmyk(74%, 52.6%, 0%, 15.7%)
CIE-LAB	lab(45.97, 23.40, -62.62)
CIE-LCH	lch(45.97, 66.84, 290.49°)
OKLab	oklab(54.26% -0.0176 -0.1803)
OKLCH	oklch(54.26% 0.181 264.4)
XYZ	xyz(18.6437, 15.2477, 66.2373)
Luminance	0.1525 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3866D7 #D7A938

analogous

#38B5D7 #3866D7 #5A38D7

triadic

#3866D7 #D73866 #66D738

tetradic

#3866D7 #D738B5 #D7A938 #38D75A

square

#3866D7 #D738B5 #D7A938 #38D75A

split-complementary

#3866D7 #D75A38 #B5D738

monochromatic

#19357C #234BAF #3866D7 #6B8DE1 #9EB4EB

Accessibility & contrast

On white

5.19

#3866D7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.05

#3866D7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3866D7

5.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3866D7	#FFFFFF	#000000	##FFFFFF
##3866D7	1.00	5.19	4.05	5.19
#FFFFFF	5.19	1.00	21.00	1.00
#000000	4.05	21.00	1.00	21.00
##FFFFFF	5.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1375DB

Deuteranopia (green-blind)

#0066D5

Tritanopia (blue-blind)

#008195

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #3866d7;
/* rgb */ color: rgb(56, 102, 215);
/* oklch */ color: oklch(54.3% 0.181 264.4);

Tailwind

colors: {
  custom: {
    50: '#8491e4',
    500: '#3866d7',
    950: '#000000',
  },
}

SCSS

$custom: #3866d7;
$custom-light: #8491e4;
$custom-dark: #000000;

JSON

{
  "hex": "#3866d7",
  "rgb": {
    "r": 56,
    "g": 102,
    "b": 215
  },
  "hsl": {
    "h": 222.642,
    "s": 66.527,
    "l": 53.137
  },
  "oklch": {
    "l": 0.54255,
    "c": 0.18114,
    "h": 264.4
  },
  "luminance": 0.1525
}

Semantic roles & 50–950 ramp

primary

#3866D7

secondary

#D8C493

accent

#B83EE9

background

#F8F8FE

surface

#F0F0FC

border

#CBCBD5

text

#0C0C16

muted

#7D7D84

Preview Lab

Preview with #3866D7

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

Preview Lab → · Contrast checker → · Palette generator →