#3173B3#3173B3

#3173B3 is a mid, vivid cyan. Relative luminance 0.162; OKLCH L 54.4% C 0.121 H 250.4°. Best body text is #FFFFFF at 4.96:1 contrast (WCAG AA passes).

Color values

HEX	#3173B3
RGB	rgb(49, 115, 179)
HSL	hsl(210, 57%, 45%)
HSV	hsv(210, 73%, 70%)
CMYK	cmyk(72.6%, 35.8%, 0%, 29.8%)
CIE-LAB	lab(47.19, 0.97, -39.96)
CIE-LCH	lch(47.19, 39.97, 271.39°)
OKLab	oklab(54.42% -0.0403 -0.1136)
OKLCH	oklch(54.42% 0.121 250.4)
XYZ	xyz(15.5310, 16.1674, 44.9412)
Luminance	0.1617 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3173B3 #B37131

analogous

#31B3B2 #3173B3 #3132B3

triadic

#3173B3 #B33173 #73B331

tetradic

#3173B3 #B231B3 #B37131 #32B331

square

#3173B3 #B231B3 #B37131 #32B331

split-complementary

#3173B3 #B33132 #B3B231

monochromatic

#173553 #245483 #3173B3 #5292D0 #82B0DD

Accessibility & contrast

On white

4.96

#3173B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.23

#3173B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3173B3

4.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3173B3	#FFFFFF	#000000	##FFFFFF
##3173B3	1.00	4.96	4.23	4.96
#FFFFFF	4.96	1.00	21.00	1.00
#000000	4.23	21.00	1.00	21.00
##FFFFFF	4.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5677B6

Deuteranopia (green-blind)

#436AB2

Tritanopia (blue-blind)

#00828A

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3173b3;
/* rgb */ color: rgb(49, 115, 179);
/* oklch */ color: oklch(54.4% 0.121 250.4);

Tailwind

colors: {
  custom: {
    50: '#7a9aca',
    500: '#3173b3',
    950: '#000000',
  },
}

SCSS

$custom: #3173b3;
$custom-light: #7a9aca;
$custom-dark: #000000;

JSON

{
  "hex": "#3173b3",
  "rgb": {
    "r": 49,
    "g": 115,
    "b": 179
  },
  "hsl": {
    "h": 209.538,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.54421,
    "c": 0.12053,
    "h": 250.4
  },
  "luminance": 0.16169
}

Semantic roles & 50–950 ramp

primary

#3173B3

secondary

#C69F7A

accent

#9348E0

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #3173B3

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

Preview Lab → · Contrast checker → · Palette generator →