#3166B7#3166B7

#3166B7 is a mid, vivid blue. Relative luminance 0.136; OKLCH L 51.7% C 0.140 H 258.8°. Best body text is #FFFFFF at 5.65:1 contrast (WCAG AA passes).

Color values

HEX	#3166B7
RGB	rgb(49, 102, 183)
HSL	hsl(216, 58%, 45%)
HSV	hsv(216, 73%, 72%)
CMYK	cmyk(73.2%, 44.3%, 0%, 28.2%)
CIE-LAB	lab(43.61, 10.59, -47.98)
CIE-LCH	lch(43.61, 49.14, 282.44°)
OKLab	oklab(51.71% -0.0273 -0.1373)
OKLCH	oklch(51.71% 0.14 258.8)
XYZ	xyz(14.5621, 13.5730, 46.6430)
Luminance	0.1358 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3166B7 #B78231

analogous

#31A9B7 #3166B7 #3F31B7

triadic

#3166B7 #B73166 #66B731

tetradic

#3166B7 #B731A9 #B78231 #31B73F

square

#3166B7 #B731A9 #B78231 #31B73F

split-complementary

#3166B7 #B73F31 #A9B731

monochromatic

#173056 #244B87 #3166B7 #5486D1 #84A8DE

Accessibility & contrast

On white

5.65

#3166B7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.72

#3166B7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3166B7

5.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3166B7	#FFFFFF	#000000	##FFFFFF
##3166B7	1.00	5.65	3.72	5.65
#FFFFFF	5.65	1.00	21.00	1.00
#000000	3.72	21.00	1.00	21.00
##FFFFFF	5.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E6EBA

Deuteranopia (green-blind)

#2461B5

Tritanopia (blue-blind)

#007985

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3166b7;
/* rgb */ color: rgb(49, 102, 183);
/* oklch */ color: oklch(51.7% 0.140 258.8);

Tailwind

colors: {
  custom: {
    50: '#7a91cd',
    500: '#3166b7',
    950: '#000000',
  },
}

SCSS

$custom: #3166b7;
$custom-light: #7a91cd;
$custom-dark: #000000;

JSON

{
  "hex": "#3166b7",
  "rgb": {
    "r": 49,
    "g": 102,
    "b": 183
  },
  "hsl": {
    "h": 216.269,
    "s": 57.759,
    "l": 45.49
  },
  "oklch": {
    "l": 0.51708,
    "c": 0.14002,
    "h": 258.8
  },
  "luminance": 0.13575
}

Semantic roles & 50–950 ramp

primary

#3166B7

secondary

#C8AA7C

accent

#A447E1

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C13

muted

#7C7D82

Preview Lab

Preview with #3166B7

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

Preview Lab → · Contrast checker → · Palette generator →