#3173B8#3173B8

#3173B8 is a mid, vivid cyan. Relative luminance 0.164; OKLCH L 54.7% C 0.127 H 252.1°. Best body text is #FFFFFF at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#3173B8
RGB	rgb(49, 115, 184)
HSL	hsl(211, 58%, 46%)
HSV	hsv(211, 73%, 72%)
CMYK	cmyk(73.4%, 37.5%, 0%, 27.8%)
CIE-LAB	lab(47.46, 2.80, -42.43)
CIE-LCH	lch(47.46, 42.52, 273.78°)
OKLab	oklab(54.72% -0.039 -0.1208)
OKLCH	oklch(54.72% 0.127 252.1)
XYZ	xyz(16.0459, 16.3733, 47.6528)
Luminance	0.1638 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3173B8 #B87631

analogous

#31B6B8 #3173B8 #3331B8

triadic

#3173B8 #B83173 #73B831

tetradic

#3173B8 #B831B6 #B87631 #31B833

square

#3173B8 #B831B6 #B87631 #31B833

split-complementary

#3173B8 #B83331 #B6B831

monochromatic

#173757 #245588 #3173B8 #5592D2 #85B1DE

Accessibility & contrast

On white

4.91

#3173B8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.27

#3173B8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3173B8

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3173B8	#FFFFFF	#000000	##FFFFFF
##3173B8	1.00	4.91	4.27	4.91
#FFFFFF	4.91	1.00	21.00	1.00
#000000	4.27	21.00	1.00	21.00
##FFFFFF	4.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5377BB

Deuteranopia (green-blind)

#3F6BB7

Tritanopia (blue-blind)

#00838D

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3173b8;
/* rgb */ color: rgb(49, 115, 184);
/* oklch */ color: oklch(54.7% 0.127 252.1);

Tailwind

colors: {
  custom: {
    50: '#7b9acd',
    500: '#3173b8',
    950: '#000000',
  },
}

SCSS

$custom: #3173b8;
$custom-light: #7b9acd;
$custom-dark: #000000;

JSON

{
  "hex": "#3173b8",
  "rgb": {
    "r": 49,
    "g": 115,
    "b": 184
  },
  "hsl": {
    "h": 210.667,
    "s": 57.94,
    "l": 45.686
  },
  "oklch": {
    "l": 0.54717,
    "c": 0.12698,
    "h": 252.1
  },
  "luminance": 0.16375
}

Semantic roles & 50–950 ramp

primary

#3173B8

secondary

#C8A37D

accent

#9647E1

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3173B8

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

Preview Lab → · Contrast checker → · Palette generator →