#3171B3#3171B3

#3171B3 is a mid, vivid cyan. Relative luminance 0.157; OKLCH L 54.0% C 0.123 H 251.7°. Best body text is #FFFFFF at 5.07:1 contrast (WCAG AA passes).

Color values

HEX	#3171B3
RGB	rgb(49, 113, 179)
HSL	hsl(210, 57%, 45%)
HSV	hsv(210, 73%, 70%)
CMYK	cmyk(72.6%, 36.9%, 0%, 29.8%)
CIE-LAB	lab(46.60, 2.20, -40.90)
CIE-LCH	lch(46.60, 40.96, 273.07°)
OKLab	oklab(53.96% -0.0384 -0.1164)
OKLCH	oklch(53.96% 0.123 251.7)
XYZ	xyz(15.3054, 15.7162, 44.8660)
Luminance	0.1572 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3171B3 #B37331

analogous

#31B2B3 #3171B3 #3231B3

triadic

#3171B3 #B33171 #71B331

tetradic

#3171B3 #B331B2 #B37331 #31B332

square

#3171B3 #B331B2 #B37331 #31B332

split-complementary

#3171B3 #B33231 #B2B331

monochromatic

#173453 #245383 #3171B3 #5290D0 #82AEDD

Accessibility & contrast

On white

5.07

#3171B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.14

#3171B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3171B3

5.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3171B3	#FFFFFF	#000000	##FFFFFF
##3171B3	1.00	5.07	4.14	5.07
#FFFFFF	5.07	1.00	21.00	1.00
#000000	4.14	21.00	1.00	21.00
##FFFFFF	5.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5375B6

Deuteranopia (green-blind)

#4069B2

Tritanopia (blue-blind)

#008189

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #3171b3;
/* rgb */ color: rgb(49, 113, 179);
/* oklch */ color: oklch(54.0% 0.123 251.7);

Tailwind

colors: {
  custom: {
    50: '#7a99ca',
    500: '#3171b3',
    950: '#000000',
  },
}

SCSS

$custom: #3171b3;
$custom-light: #7a99ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3171b3",
  "rgb": {
    "r": 49,
    "g": 113,
    "b": 179
  },
  "hsl": {
    "h": 210.462,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.53956,
    "c": 0.12254,
    "h": 251.7
  },
  "luminance": 0.15718
}

Semantic roles & 50–950 ramp

primary

#3171B3

secondary

#C6A07A

accent

#9548E0

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0A0D13

muted

#7C7E82

Preview Lab

Preview with #3171B3

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

Preview Lab → · Contrast checker → · Palette generator →