#3866C7#3866C7

#3866C7 is a mid, vivid blue. Relative luminance 0.145; OKLCH L 53.1% C 0.160 H 263.0°. Best body text is #FFFFFF at 5.39:1 contrast (WCAG AA passes).

Color values

HEX	#3866C7
RGB	rgb(56, 102, 199)
HSL	hsl(221, 56%, 50%)
HSV	hsv(221, 72%, 78%)
CMYK	cmyk(71.9%, 48.7%, 0%, 22%)
CIE-LAB	lab(44.89, 17.51, -55.19)
CIE-LCH	lch(44.89, 57.90, 287.60°)
OKLab	oklab(53.09% -0.0194 -0.1584)
OKLCH	oklch(53.09% 0.16 263)
XYZ	xyz(16.6874, 14.4652, 55.9344)
Luminance	0.1447 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3866C7 #C79938

analogous

#38AEC7 #3866C7 #5138C7

triadic

#3866C7 #C73866 #66C738

tetradic

#3866C7 #C738AE #C79938 #38C751

square

#3866C7 #C738AE #C79938 #38C751

split-complementary

#3866C7 #C75138 #AEC738

monochromatic

#1D3567 #2B4E97 #3866C7 #688BD4 #98AFE2

Accessibility & contrast

On white

5.39

#3866C7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.89

#3866C7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3866C7

5.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3866C7	#FFFFFF	#000000	##FFFFFF
##3866C7	1.00	5.39	3.89	5.39
#FFFFFF	5.39	1.00	21.00	1.00
#000000	3.89	21.00	1.00	21.00
##FFFFFF	5.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F71CB

Deuteranopia (green-blind)

#0064C5

Tritanopia (blue-blind)

#007D8D

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3866c7;
/* rgb */ color: rgb(56, 102, 199);
/* oklch */ color: oklch(53.1% 0.160 263.0);

Tailwind

colors: {
  custom: {
    50: '#8091d9',
    500: '#3866c7',
    950: '#000000',
  },
}

SCSS

$custom: #3866c7;
$custom-light: #8091d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3866c7",
  "rgb": {
    "r": 56,
    "g": 102,
    "b": 199
  },
  "hsl": {
    "h": 220.699,
    "s": 56.078,
    "l": 50
  },
  "oklch": {
    "l": 0.5309,
    "c": 0.15961,
    "h": 263
  },
  "luminance": 0.14467
}

Semantic roles & 50–950 ramp

primary

#3866C7

secondary

#CDB98D

accent

#AF48DF

background

#F8F8FD

surface

#F0F0FA

border

#CBCBD3

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3866C7

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

Preview Lab → · Contrast checker → · Palette generator →