#3166B8#3166B8

#3166B8 is a mid, vivid blue. Relative luminance 0.136; OKLCH L 51.8% C 0.141 H 259.0°. Best body text is #FFFFFF at 5.64:1 contrast (WCAG AA passes).

Color values

HEX	#3166B8
RGB	rgb(49, 102, 184)
HSL	hsl(216, 58%, 46%)
HSV	hsv(216, 73%, 72%)
CMYK	cmyk(73.4%, 44.6%, 0%, 27.8%)
CIE-LAB	lab(43.68, 10.96, -48.47)
CIE-LCH	lch(43.68, 49.69, 282.75°)
OKLab	oklab(51.78% -0.0271 -0.1388)
OKLCH	oklch(51.78% 0.141 259)
XYZ	xyz(14.6666, 13.6148, 47.1931)
Luminance	0.1362 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3166B8 #B88331

analogous

#31AAB8 #3166B8 #3F31B8

triadic

#3166B8 #B83166 #66B831

tetradic

#3166B8 #B831AA #B88331 #31B83F

square

#3166B8 #B831AA #B88331 #31B83F

split-complementary

#3166B8 #B83F31 #AAB831

monochromatic

#173057 #244B88 #3166B8 #5586D2 #85A8DE

Accessibility & contrast

On white

5.64

#3166B8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.72

#3166B8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3166B8

5.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3166B8	#FFFFFF	#000000	##FFFFFF
##3166B8	1.00	5.64	3.72	5.64
#FFFFFF	5.64	1.00	21.00	1.00
#000000	3.72	21.00	1.00	21.00
##FFFFFF	5.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D6EBB

Deuteranopia (green-blind)

#2261B6

Tritanopia (blue-blind)

#007986

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3166b8;
/* rgb */ color: rgb(49, 102, 184);
/* oklch */ color: oklch(51.8% 0.141 259.0);

Tailwind

colors: {
  custom: {
    50: '#7b91ce',
    500: '#3166b8',
    950: '#000000',
  },
}

SCSS

$custom: #3166b8;
$custom-light: #7b91ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3166b8",
  "rgb": {
    "r": 49,
    "g": 102,
    "b": 184
  },
  "hsl": {
    "h": 216.444,
    "s": 57.94,
    "l": 45.686
  },
  "oklch": {
    "l": 0.51775,
    "c": 0.14139,
    "h": 259
  },
  "luminance": 0.13616
}

Semantic roles & 50–950 ramp

primary

#3166B8

secondary

#C8AA7D

accent

#A447E1

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C13

muted

#7C7D82

Preview Lab

Preview with #3166B8

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

Preview Lab → · Contrast checker → · Palette generator →