#3173BB#3173BB

#3173BB is a mid, vivid cyan. Relative luminance 0.165; OKLCH L 54.9% C 0.131 H 253.0°. Best body text is #FFFFFF at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#3173BB
RGB	rgb(49, 115, 187)
HSL	hsl(211, 58%, 46%)
HSV	hsv(211, 74%, 73%)
CMYK	cmyk(73.8%, 38.5%, 0%, 26.7%)
CIE-LAB	lab(47.62, 3.91, -43.91)
CIE-LCH	lch(47.62, 44.08, 275.09°)
OKLab	oklab(54.9% -0.0383 -0.1251)
OKLCH	oklch(54.9% 0.131 253)
XYZ	xyz(16.3637, 16.5005, 49.3266)
Luminance	0.1650 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3173BB #BB7931

analogous

#31B8BB #3173BB #3431BB

triadic

#3173BB #BB3173 #73BB31

tetradic

#3173BB #BB31B8 #BB7931 #31BB34

square

#3173BB #BB31B8 #BB7931 #31BB34

split-complementary

#3173BB #BB3431 #B8BB31

monochromatic

#18375A #24558B #3173BB #5692D3 #87B1E0

Accessibility & contrast

On white

4.88

#3173BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.30

#3173BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3173BB

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3173BB	#FFFFFF	#000000	##FFFFFF
##3173BB	1.00	4.88	4.30	4.88
#FFFFFF	4.88	1.00	21.00	1.00
#000000	4.30	21.00	1.00	21.00
##FFFFFF	4.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5278BE

Deuteranopia (green-blind)

#3C6BBA

Tritanopia (blue-blind)

#00848E

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3173bb;
/* rgb */ color: rgb(49, 115, 187);
/* oklch */ color: oklch(54.9% 0.131 253.0);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#3173bb",
  "rgb": {
    "r": 49,
    "g": 115,
    "b": 187
  },
  "hsl": {
    "h": 211.304,
    "s": 58.475,
    "l": 46.275
  },
  "oklch": {
    "l": 0.54899,
    "c": 0.13087,
    "h": 253
  },
  "luminance": 0.16502
}

Semantic roles & 50–950 ramp

primary

#3173BB

secondary

#C9A67F

accent

#9746E2

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3173BB

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

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