#3173BC#3173BC

#3173BC is a mid, vivid cyan. Relative luminance 0.165; OKLCH L 55.0% C 0.132 H 253.3°. Best body text is #FFFFFF at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#3173BC
RGB	rgb(49, 115, 188)
HSL	hsl(212, 59%, 46%)
HSV	hsv(212, 74%, 74%)
CMYK	cmyk(73.9%, 38.8%, 0%, 26.3%)
CIE-LAB	lab(47.68, 4.28, -44.40)
CIE-LCH	lch(47.68, 44.60, 275.51°)
OKLab	oklab(54.96% -0.038 -0.1266)
OKLCH	oklch(54.96% 0.132 253.3)
XYZ	xyz(16.4711, 16.5434, 49.8923)
Luminance	0.1655 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3173BC #BC7A31

analogous

#31B9BC #3173BC #3531BC

triadic

#3173BC #BC3173 #73BC31

tetradic

#3173BC #BC31B9 #BC7A31 #31BC35

square

#3173BC #BC31B9 #BC7A31 #31BC35

split-complementary

#3173BC #BC3531 #B9BC31

monochromatic

#18385B #24558B #3173BC #5792D3 #88B1E0

Accessibility & contrast

On white

4.87

#3173BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.31

#3173BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3173BC

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3173BC	#FFFFFF	#000000	##FFFFFF
##3173BC	1.00	4.87	4.31	4.87
#FFFFFF	4.87	1.00	21.00	1.00
#000000	4.31	21.00	1.00	21.00
##FFFFFF	4.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5178BF

Deuteranopia (green-blind)

#3B6BBB

Tritanopia (blue-blind)

#00848E

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3173bc;
/* rgb */ color: rgb(49, 115, 188);
/* oklch */ color: oklch(55.0% 0.132 253.3);

Tailwind

colors: {
  custom: {
    50: '#7b9ad0',
    500: '#3173bc',
    950: '#000000',
  },
}

SCSS

$custom: #3173bc;
$custom-light: #7b9ad0;
$custom-dark: #000000;

JSON

{
  "hex": "#3173bc",
  "rgb": {
    "r": 49,
    "g": 115,
    "b": 188
  },
  "hsl": {
    "h": 211.511,
    "s": 58.65,
    "l": 46.471
  },
  "oklch": {
    "l": 0.5496,
    "c": 0.13218,
    "h": 253.3
  },
  "luminance": 0.16545
}

Semantic roles & 50–950 ramp

primary

#3173BC

secondary

#CAA67F

accent

#9846E2

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3173BC

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

Preview Lab → · Contrast checker → · Palette generator →