#3166CC#3166CC

#3166CC is a mid, vivid blue. Relative luminance 0.145; OKLCH L 53.2% C 0.168 H 261.8°. Best body text is #FFFFFF at 5.38:1 contrast (WCAG AA passes).

Color values

HEX	#3166CC
RGB	rgb(49, 102, 204)
HSL	hsl(219, 61%, 50%)
HSV	hsv(219, 76%, 80%)
CMYK	cmyk(76%, 50%, 0%, 20%)
CIE-LAB	lab(44.96, 18.47, -57.97)
CIE-LCH	lch(44.96, 60.84, 287.67°)
OKLab	oklab(53.17% -0.0239 -0.1667)
OKLCH	oklch(53.17% 0.168 261.8)
XYZ	xyz(16.9132, 14.5134, 59.0250)
Luminance	0.1452 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3166CC #CC9731

analogous

#31B4CC #3166CC #4A31CC

triadic

#3166CC #CC3166 #66CC31

tetradic

#3166CC #CC31B4 #CC9731 #31CC4A

square

#3166CC #CC31B4 #CC9731 #31CC4A

split-complementary

#3166CC #CC4A31 #B4CC31

monochromatic

#193569 #254D9B #3166CC #618AD9 #92AFE5

Accessibility & contrast

On white

5.38

#3166CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.90

#3166CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3166CC

5.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3166CC	#FFFFFF	#000000	##FFFFFF
##3166CC	1.00	5.38	3.90	5.38
#FFFFFF	5.38	1.00	21.00	1.00
#000000	3.90	21.00	1.00	21.00
##FFFFFF	5.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2872D0

Deuteranopia (green-blind)

#0064CA

Tritanopia (blue-blind)

#007E8F

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3166cc;
/* rgb */ color: rgb(49, 102, 204);
/* oklch */ color: oklch(53.2% 0.168 261.8);

Tailwind

colors: {
  custom: {
    50: '#7f91dc',
    500: '#3166cc',
    950: '#000000',
  },
}

SCSS

$custom: #3166cc;
$custom-light: #7f91dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3166cc",
  "rgb": {
    "r": 49,
    "g": 102,
    "b": 204
  },
  "hsl": {
    "h": 219.484,
    "s": 61.265,
    "l": 49.608
  },
  "oklch": {
    "l": 0.53174,
    "c": 0.16844,
    "h": 261.8
  },
  "luminance": 0.14515
}

Semantic roles & 50–950 ramp

primary

#3166CC

secondary

#D0B889

accent

#AD43E4

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3166CC

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

Preview Lab → · Contrast checker → · Palette generator →