#3166BB#3166BB

#3166BB is a mid, vivid blue. Relative luminance 0.137; OKLCH L 52.0% C 0.145 H 259.5°. Best body text is #FFFFFF at 5.60:1 contrast (WCAG AA passes).

Color values

HEX	#3166BB
RGB	rgb(49, 102, 187)
HSL	hsl(217, 58%, 46%)
HSV	hsv(217, 74%, 73%)
CMYK	cmyk(73.8%, 45.5%, 0%, 26.7%)
CIE-LAB	lab(43.86, 12.09, -49.92)
CIE-LCH	lch(43.86, 51.36, 283.61°)
OKLab	oklab(51.98% -0.0265 -0.143)
OKLCH	oklch(51.98% 0.145 259.5)
XYZ	xyz(14.9844, 13.7419, 48.8668)
Luminance	0.1374 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3166BB #BB8631

analogous

#31ABBB #3166BB #4131BB

triadic

#3166BB #BB3166 #66BB31

tetradic

#3166BB #BB31AB #BB8631 #31BB41

square

#3166BB #BB31AB #BB8631 #31BB41

split-complementary

#3166BB #BB4131 #ABBB31

monochromatic

#18315A #244C8B #3166BB #5686D3 #87A9E0

Accessibility & contrast

On white

5.60

#3166BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.75

#3166BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3166BB

5.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3166BB	#FFFFFF	#000000	##FFFFFF
##3166BB	1.00	5.60	3.75	5.60
#FFFFFF	5.60	1.00	21.00	1.00
#000000	3.75	21.00	1.00	21.00
##FFFFFF	5.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A6EBE

Deuteranopia (green-blind)

#1D62B9

Tritanopia (blue-blind)

#007A87

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #3166bb;
/* rgb */ color: rgb(49, 102, 187);
/* oklch */ color: oklch(52.0% 0.145 259.5);

Tailwind

colors: {
  custom: {
    50: '#7b91d0',
    500: '#3166bb',
    950: '#000000',
  },
}

SCSS

$custom: #3166bb;
$custom-light: #7b91d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3166bb",
  "rgb": {
    "r": 49,
    "g": 102,
    "b": 187
  },
  "hsl": {
    "h": 216.957,
    "s": 58.475,
    "l": 46.275
  },
  "oklch": {
    "l": 0.51977,
    "c": 0.14547,
    "h": 259.5
  },
  "luminance": 0.13744
}

Semantic roles & 50–950 ramp

primary

#3166BB

secondary

#C9AD7F

accent

#A646E2

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3166BB

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

Preview Lab → · Contrast checker → · Palette generator →