#3866AD#3866AD

#3866AD is a mid, vivid blue. Relative luminance 0.134; OKLCH L 51.3% C 0.124 H 258.8°. Best body text is #FFFFFF at 5.72:1 contrast (WCAG AA passes).

Color values

HEX	#3866AD
RGB	rgb(56, 102, 173)
HSL	hsl(216, 51%, 45%)
HSV	hsv(216, 68%, 68%)
CMYK	cmyk(67.6%, 41%, 0%, 32.2%)
CIE-LAB	lab(43.30, 7.97, -42.62)
CIE-LCH	lch(43.30, 43.36, 280.59°)
OKLab	oklab(51.35% -0.024 -0.1215)
OKLCH	oklch(51.35% 0.124 258.8)
XYZ	xyz(13.9224, 13.3592, 41.3719)
Luminance	0.1336 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3866AD #AD7F38

analogous

#38A1AD #3866AD #4438AD

triadic

#3866AD #AD3866 #66AD38

tetradic

#3866AD #AD38A1 #AD7F38 #38AD44

square

#3866AD #AD38A1 #AD7F38 #38AD44

split-complementary

#3866AD #AD4438 #A1AD38

monochromatic

#1A2F51 #294B7F #3866AD #5985C9 #87A7D8

Accessibility & contrast

On white

5.72

#3866AD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.67

#3866AD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3866AD

5.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3866AD	#FFFFFF	#000000	##FFFFFF
##3866AD	1.00	5.72	3.67	5.72
#FFFFFF	5.72	1.00	21.00	1.00
#000000	3.67	21.00	1.00	21.00
##FFFFFF	5.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#456CB0

Deuteranopia (green-blind)

#3361AC

Tritanopia (blue-blind)

#007681

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #3866ad;
/* rgb */ color: rgb(56, 102, 173);
/* oklch */ color: oklch(51.3% 0.124 258.8);

Tailwind

colors: {
  custom: {
    50: '#7b91c6',
    500: '#3866ad',
    950: '#000000',
  },
}

SCSS

$custom: #3866ad;
$custom-light: #7b91c6;
$custom-dark: #000000;

JSON

{
  "hex": "#3866ad",
  "rgb": {
    "r": 56,
    "g": 102,
    "b": 173
  },
  "hsl": {
    "h": 216.41,
    "s": 51.092,
    "l": 44.902
  },
  "oklch": {
    "l": 0.5135,
    "c": 0.12383,
    "h": 258.8
  },
  "luminance": 0.13361
}

Semantic roles & 50–950 ramp

primary

#3866AD

secondary

#C2A87F

accent

#A34DDB

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0A0C13

muted

#7C7D82

Preview Lab

Preview with #3866AD

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

Preview Lab → · Contrast checker → · Palette generator →