#3166B2#3166B2

#3166B2 is a mid, vivid blue. Relative luminance 0.134; OKLCH L 51.4% C 0.133 H 257.8°. Best body text is #FFFFFF at 5.72:1 contrast (WCAG AA passes).

Color values

HEX	#3166B2
RGB	rgb(49, 102, 178)
HSL	hsl(215, 57%, 45%)
HSV	hsv(215, 72%, 70%)
CMYK	cmyk(72.5%, 42.7%, 0%, 30.2%)
CIE-LAB	lab(43.31, 8.72, -45.54)
CIE-LCH	lch(43.31, 46.37, 280.84°)
OKLab	oklab(51.38% -0.0283 -0.1302)
OKLCH	oklch(51.38% 0.133 257.8)
XYZ	xyz(14.0509, 13.3685, 43.9507)
Luminance	0.1337 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3166B2 #B27D31

analogous

#31A7B2 #3166B2 #3D31B2

triadic

#3166B2 #B23166 #66B231

tetradic

#3166B2 #B231A7 #B27D31 #31B23D

square

#3166B2 #B231A7 #B27D31 #31B23D

split-complementary

#3166B2 #B23D31 #A7B231

monochromatic

#172F52 #244B82 #3166B2 #5185CF #81A7DC

Accessibility & contrast

On white

5.72

#3166B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.67

#3166B2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3166B2

5.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3166B2	#FFFFFF	#000000	##FFFFFF
##3166B2	1.00	5.72	3.67	5.72
#FFFFFF	5.72	1.00	21.00	1.00
#000000	3.67	21.00	1.00	21.00
##FFFFFF	5.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#416DB5

Deuteranopia (green-blind)

#2B61B0

Tritanopia (blue-blind)

#007883

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #3166b2;
/* rgb */ color: rgb(49, 102, 178);
/* oklch */ color: oklch(51.4% 0.133 257.8);

Tailwind

colors: {
  custom: {
    50: '#7991c9',
    500: '#3166b2',
    950: '#000000',
  },
}

SCSS

$custom: #3166b2;
$custom-light: #7991c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3166b2",
  "rgb": {
    "r": 49,
    "g": 102,
    "b": 178
  },
  "hsl": {
    "h": 215.349,
    "s": 56.828,
    "l": 44.51
  },
  "oklch": {
    "l": 0.51378,
    "c": 0.1332,
    "h": 257.8
  },
  "luminance": 0.1337
}

Semantic roles & 50–950 ramp

primary

#3166B2

secondary

#C5A679

accent

#A148E0

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#0A0C13

muted

#7C7D82

Preview Lab

Preview with #3166B2

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

Preview Lab → · Contrast checker → · Palette generator →