#3173B9#3173B9

#3173B9 is a mid, vivid cyan. Relative luminance 0.164; OKLCH L 54.8% C 0.128 H 252.4°. Best body text is #FFFFFF at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#3173B9
RGB	rgb(49, 115, 185)
HSL	hsl(211, 58%, 46%)
HSV	hsv(211, 74%, 73%)
CMYK	cmyk(73.5%, 37.8%, 0%, 27.5%)
CIE-LAB	lab(47.51, 3.17, -42.92)
CIE-LCH	lch(47.51, 43.04, 274.23°)
OKLab	oklab(54.78% -0.0388 -0.1223)
OKLCH	oklch(54.78% 0.128 252.4)
XYZ	xyz(16.1510, 16.4154, 48.2068)
Luminance	0.1642 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3173B9 #B97731

analogous

#31B7B9 #3173B9 #3331B9

triadic

#3173B9 #B93173 #73B931

tetradic

#3173B9 #B931B7 #B97731 #31B933

square

#3173B9 #B931B7 #B97731 #31B933

split-complementary

#3173B9 #B93331 #B7B931

monochromatic

#173758 #245589 #3173B9 #5592D2 #86B1DF

Accessibility & contrast

On white

4.90

#3173B9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.28

#3173B9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3173B9

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3173B9	#FFFFFF	#000000	##FFFFFF
##3173B9	1.00	4.90	4.28	4.90
#FFFFFF	4.90	1.00	21.00	1.00
#000000	4.28	21.00	1.00	21.00
##FFFFFF	4.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5378BC

Deuteranopia (green-blind)

#3E6BB8

Tritanopia (blue-blind)

#00838D

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3173b9;
/* rgb */ color: rgb(49, 115, 185);
/* oklch */ color: oklch(54.8% 0.128 252.4);

Tailwind

colors: {
  custom: {
    50: '#7b9ace',
    500: '#3173b9',
    950: '#000000',
  },
}

SCSS

$custom: #3173b9;
$custom-light: #7b9ace;
$custom-dark: #000000;

JSON

{
  "hex": "#3173b9",
  "rgb": {
    "r": 49,
    "g": 115,
    "b": 185
  },
  "hsl": {
    "h": 210.882,
    "s": 58.12,
    "l": 45.882
  },
  "oklch": {
    "l": 0.54778,
    "c": 0.12827,
    "h": 252.4
  },
  "luminance": 0.16417
}

Semantic roles & 50–950 ramp

primary

#3173B9

secondary

#C8A47D

accent

#9646E1

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3173B9

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

Preview Lab → · Contrast checker → · Palette generator →