#3166B9#3166B9

#3166B9 is a mid, vivid blue. Relative luminance 0.137; OKLCH L 51.8% C 0.143 H 259.1°. Best body text is #FFFFFF at 5.63:1 contrast (WCAG AA passes).

Color values

HEX	#3166B9
RGB	rgb(49, 102, 185)
HSL	hsl(217, 58%, 46%)
HSV	hsv(217, 74%, 73%)
CMYK	cmyk(73.5%, 44.9%, 0%, 27.5%)
CIE-LAB	lab(43.74, 11.34, -48.95)
CIE-LCH	lch(43.74, 50.25, 283.04°)
OKLab	oklab(51.84% -0.0269 -0.1402)
OKLCH	oklch(51.84% 0.143 259.1)
XYZ	xyz(14.7718, 13.6569, 47.7471)
Luminance	0.1366 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3166B9 #B98431

analogous

#31AAB9 #3166B9 #4031B9

triadic

#3166B9 #B93166 #66B931

tetradic

#3166B9 #B931AA #B98431 #31B940

square

#3166B9 #B931AA #B98431 #31B940

split-complementary

#3166B9 #B94031 #AAB931

monochromatic

#173158 #244B89 #3166B9 #5586D2 #86A8DF

Accessibility & contrast

On white

5.63

#3166B9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.73

#3166B9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3166B9

5.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3166B9	#FFFFFF	#000000	##FFFFFF
##3166B9	1.00	5.63	3.73	5.63
#FFFFFF	5.63	1.00	21.00	1.00
#000000	3.73	21.00	1.00	21.00
##FFFFFF	5.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C6EBC

Deuteranopia (green-blind)

#2162B7

Tritanopia (blue-blind)

#007986

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3166b9;
/* rgb */ color: rgb(49, 102, 185);
/* oklch */ color: oklch(51.8% 0.143 259.1);

Tailwind

colors: {
  custom: {
    50: '#7b91ce',
    500: '#3166b9',
    950: '#000000',
  },
}

SCSS

$custom: #3166b9;
$custom-light: #7b91ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3166b9",
  "rgb": {
    "r": 49,
    "g": 102,
    "b": 185
  },
  "hsl": {
    "h": 216.618,
    "s": 58.12,
    "l": 45.882
  },
  "oklch": {
    "l": 0.51842,
    "c": 0.14274,
    "h": 259.1
  },
  "luminance": 0.13658
}

Semantic roles & 50–950 ramp

primary

#3166B9

secondary

#C8AB7D

accent

#A546E1

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3166B9

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

Preview Lab → · Contrast checker → · Palette generator →