#3866BD#3866BD

#3866BD is a mid, vivid blue. Relative luminance 0.140; OKLCH L 52.4% C 0.146 H 261.8°. Best body text is #FFFFFF at 5.52:1 contrast (WCAG AA passes).

Color values

HEX	#3866BD
RGB	rgb(56, 102, 189)
HSL	hsl(219, 54%, 48%)
HSV	hsv(219, 70%, 74%)
CMYK	cmyk(70.4%, 46%, 0%, 25.9%)
CIE-LAB	lab(44.26, 13.82, -50.43)
CIE-LCH	lch(44.26, 52.29, 285.33°)
OKLab	oklab(52.4% -0.0209 -0.1444)
OKLCH	oklch(52.4% 0.146 261.8)
XYZ	xyz(15.5643, 14.0160, 50.0193)
Luminance	0.1402 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3866BD #BD8F38

analogous

#38A8BD #3866BD #4C38BD

triadic

#3866BD #BD3866 #66BD38

tetradic

#3866BD #BD38A8 #BD8F38 #38BD4C

square

#3866BD #BD38A8 #BD8F38 #38BD4C

split-complementary

#3866BD #BD4C38 #A8BD38

monochromatic

#1C335F #2A4D8E #3866BD #6288D0 #91ACDE

Accessibility & contrast

On white

5.52

#3866BD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.80

#3866BD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3866BD

5.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3866BD	#FFFFFF	#000000	##FFFFFF
##3866BD	1.00	5.52	3.80	5.52
#FFFFFF	5.52	1.00	21.00	1.00
#000000	3.80	21.00	1.00	21.00
##FFFFFF	5.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A6FC0

Deuteranopia (green-blind)

#1E63BB

Tritanopia (blue-blind)

#007A88

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #3866bd;
/* rgb */ color: rgb(56, 102, 189);
/* oklch */ color: oklch(52.4% 0.146 261.8);

Tailwind

colors: {
  custom: {
    50: '#7e91d1',
    500: '#3866bd',
    950: '#000000',
  },
}

SCSS

$custom: #3866bd;
$custom-light: #7e91d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3866bd",
  "rgb": {
    "r": 56,
    "g": 102,
    "b": 189
  },
  "hsl": {
    "h": 219.248,
    "s": 54.286,
    "l": 48.039
  },
  "oklch": {
    "l": 0.52397,
    "c": 0.14594,
    "h": 261.8
  },
  "luminance": 0.14018
}

Semantic roles & 50–950 ramp

primary

#3866BD

secondary

#C9B387

accent

#AB4ADE

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3866BD

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

Preview Lab → · Contrast checker → · Palette generator →