#3166B1#3166B1

#3166B1 is a mid, vivid blue. Relative luminance 0.133; OKLCH L 51.3% C 0.132 H 257.5°. Best body text is #FFFFFF at 5.73:1 contrast (WCAG AA passes).

Color values

HEX	#3166B1
RGB	rgb(49, 102, 177)
HSL	hsl(215, 57%, 44%)
HSV	hsv(215, 72%, 69%)
CMYK	cmyk(72.3%, 42.4%, 0%, 30.6%)
CIE-LAB	lab(43.25, 8.34, -45.05)
CIE-LCH	lch(43.25, 45.82, 280.49°)
OKLab	oklab(51.31% -0.0285 -0.1287)
OKLCH	oklch(51.31% 0.132 257.5)
XYZ	xyz(13.9509, 13.3285, 43.4239)
Luminance	0.1333 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3166B1 #B17C31

analogous

#31A6B1 #3166B1 #3C31B1

triadic

#3166B1 #B13166 #66B131

tetradic

#3166B1 #B131A6 #B17C31 #31B13C

square

#3166B1 #B131A6 #B17C31 #31B13C

split-complementary

#3166B1 #B13C31 #A6B131

monochromatic

#162F51 #244A81 #3166B1 #5185CF #80A6DC

Accessibility & contrast

On white

5.73

#3166B1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.67

#3166B1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3166B1

5.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3166B1	#FFFFFF	#000000	##FFFFFF
##3166B1	1.00	5.73	3.67	5.73
#FFFFFF	5.73	1.00	21.00	1.00
#000000	3.67	21.00	1.00	21.00
##FFFFFF	5.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#426DB4

Deuteranopia (green-blind)

#2C61AF

Tritanopia (blue-blind)

#007883

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #3166b1;
/* rgb */ color: rgb(49, 102, 177);
/* oklch */ color: oklch(51.3% 0.132 257.5);

Tailwind

colors: {
  custom: {
    50: '#7991c9',
    500: '#3166b1',
    950: '#000000',
  },
}

SCSS

$custom: #3166b1;
$custom-light: #7991c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3166b1",
  "rgb": {
    "r": 49,
    "g": 102,
    "b": 177
  },
  "hsl": {
    "h": 215.156,
    "s": 56.637,
    "l": 44.314
  },
  "oklch": {
    "l": 0.51313,
    "c": 0.13184,
    "h": 257.5
  },
  "luminance": 0.1333
}

Semantic roles & 50–950 ramp

primary

#3166B1

secondary

#C5A579

accent

#A148E0

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#0A0C13

muted

#7C7D82

Preview Lab

Preview with #3166B1

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

Preview Lab → · Contrast checker → · Palette generator →