#3866AC#3866AC

#3866AC is a mid, vivid blue. Relative luminance 0.133; OKLCH L 51.3% C 0.122 H 258.6°. Best body text is #FFFFFF at 5.73:1 contrast (WCAG AA passes).

Color values

HEX	#3866AC
RGB	rgb(56, 102, 172)
HSL	hsl(216, 51%, 45%)
HSV	hsv(216, 67%, 67%)
CMYK	cmyk(67.4%, 40.7%, 0%, 32.5%)
CIE-LAB	lab(43.24, 7.60, -42.12)
CIE-LCH	lch(43.24, 42.80, 280.23°)
OKLab	oklab(51.29% -0.0242 -0.12)
OKLCH	oklch(51.29% 0.122 258.6)
XYZ	xyz(13.8260, 13.3207, 40.8642)
Luminance	0.1332 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3866AC #AC7E38

analogous

#38A0AC #3866AC #4438AC

triadic

#3866AC #AC3866 #66AC38

tetradic

#3866AC #AC38A0 #AC7E38 #38AC44

square

#3866AC #AC38A0 #AC7E38 #38AC44

split-complementary

#3866AC #AC4438 #A0AC38

monochromatic

#1A2F50 #294B7E #3866AC #5885C9 #87A7D8

Accessibility & contrast

On white

5.73

#3866AC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.66

#3866AC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3866AC

5.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3866AC	#FFFFFF	#000000	##FFFFFF
##3866AC	1.00	5.73	3.66	5.73
#FFFFFF	5.73	1.00	21.00	1.00
#000000	3.66	21.00	1.00	21.00
##FFFFFF	5.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#466CAF

Deuteranopia (green-blind)

#3461AB

Tritanopia (blue-blind)

#007680

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #3866ac;
/* rgb */ color: rgb(56, 102, 172);
/* oklch */ color: oklch(51.3% 0.122 258.6);

Tailwind

colors: {
  custom: {
    50: '#7b91c5',
    500: '#3866ac',
    950: '#000000',
  },
}

SCSS

$custom: #3866ac;
$custom-light: #7b91c5;
$custom-dark: #000000;

JSON

{
  "hex": "#3866ac",
  "rgb": {
    "r": 56,
    "g": 102,
    "b": 172
  },
  "hsl": {
    "h": 216.207,
    "s": 50.877,
    "l": 44.706
  },
  "oklch": {
    "l": 0.51287,
    "c": 0.12244,
    "h": 258.6
  },
  "luminance": 0.13322
}

Semantic roles & 50–950 ramp

primary

#3866AC

secondary

#C2A77E

accent

#A24DDA

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0A0C13

muted

#7C7D82

Preview Lab

Preview with #3866AC

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

Preview Lab → · Contrast checker → · Palette generator →