#3166BC#3166BC

#3166BC is a mid, vivid blue. Relative luminance 0.138; OKLCH L 52.0% C 0.147 H 259.7°. Best body text is #FFFFFF at 5.59:1 contrast (WCAG AA passes).

Color values

HEX	#3166BC
RGB	rgb(49, 102, 188)
HSL	hsl(217, 59%, 46%)
HSV	hsv(217, 74%, 74%)
CMYK	cmyk(73.9%, 45.7%, 0%, 26.3%)
CIE-LAB	lab(43.92, 12.46, -50.40)
CIE-LCH	lch(43.92, 51.92, 283.89°)
OKLab	oklab(52.05% -0.0263 -0.1444)
OKLCH	oklch(52.05% 0.147 259.7)
XYZ	xyz(15.0918, 13.7849, 49.4326)
Luminance	0.1379 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3166BC #BC8731

analogous

#31ACBC #3166BC #4131BC

triadic

#3166BC #BC3166 #66BC31

tetradic

#3166BC #BC31AC #BC8731 #31BC41

square

#3166BC #BC31AC #BC8731 #31BC41

split-complementary

#3166BC #BC4131 #ACBC31

monochromatic

#18315B #244C8B #3166BC #5786D3 #88A9E0

Accessibility & contrast

On white

5.59

#3166BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.76

#3166BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3166BC

5.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3166BC	#FFFFFF	#000000	##FFFFFF
##3166BC	1.00	5.59	3.76	5.59
#FFFFFF	5.59	1.00	21.00	1.00
#000000	3.76	21.00	1.00	21.00
##FFFFFF	5.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#396FBF

Deuteranopia (green-blind)

#1B62BA

Tritanopia (blue-blind)

#007A88

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #3166bc;
/* rgb */ color: rgb(49, 102, 188);
/* oklch */ color: oklch(52.0% 0.147 259.7);

Tailwind

colors: {
  custom: {
    50: '#7b91d1',
    500: '#3166bc',
    950: '#000000',
  },
}

SCSS

$custom: #3166bc;
$custom-light: #7b91d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3166bc",
  "rgb": {
    "r": 49,
    "g": 102,
    "b": 188
  },
  "hsl": {
    "h": 217.122,
    "s": 58.65,
    "l": 46.471
  },
  "oklch": {
    "l": 0.52046,
    "c": 0.14683,
    "h": 259.7
  },
  "luminance": 0.13787
}

Semantic roles & 50–950 ramp

primary

#3166BC

secondary

#CAAD7F

accent

#A646E2

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3166BC

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

Preview Lab → · Contrast checker → · Palette generator →