#3173B1#3173B1

#3173B1 is a mid, moderate cyan. Relative luminance 0.161; OKLCH L 54.3% C 0.118 H 249.7°. Best body text is #FFFFFF at 4.98:1 contrast (WCAG AA passes).

Color values

HEX	#3173B1
RGB	rgb(49, 115, 177)
HSL	hsl(209, 57%, 44%)
HSV	hsv(209, 72%, 69%)
CMYK	cmyk(72.3%, 35%, 0%, 30.6%)
CIE-LAB	lab(47.09, 0.24, -38.96)
CIE-LCH	lch(47.09, 38.96, 270.35°)
OKLab	oklab(54.3% -0.0409 -0.1107)
OKLCH	oklch(54.3% 0.118 249.7)
XYZ	xyz(15.3302, 16.0871, 43.8836)
Luminance	0.1609 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3173B1 #B16F31

analogous

#31B1AF #3173B1 #3133B1

triadic

#3173B1 #B13173 #73B131

tetradic

#3173B1 #AF31B1 #B16F31 #33B131

square

#3173B1 #AF31B1 #B16F31 #33B131

split-complementary

#3173B1 #B13133 #B1AF31

monochromatic

#163551 #245481 #3173B1 #5192CF #80B0DC

Accessibility & contrast

On white

4.98

#3173B1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.22

#3173B1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3173B1

4.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3173B1	#FFFFFF	#000000	##FFFFFF
##3173B1	1.00	4.98	4.22	4.98
#FFFFFF	4.98	1.00	21.00	1.00
#000000	4.22	21.00	1.00	21.00
##FFFFFF	4.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5776B4

Deuteranopia (green-blind)

#446AB0

Tritanopia (blue-blind)

#00828A

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3173b1;
/* rgb */ color: rgb(49, 115, 177);
/* oklch */ color: oklch(54.3% 0.118 249.7);

Tailwind

colors: {
  custom: {
    50: '#799ac8',
    500: '#3173b1',
    950: '#000000',
  },
}

SCSS

$custom: #3173b1;
$custom-light: #799ac8;
$custom-dark: #000000;

JSON

{
  "hex": "#3173b1",
  "rgb": {
    "r": 49,
    "g": 115,
    "b": 177
  },
  "hsl": {
    "h": 209.063,
    "s": 56.637,
    "l": 44.314
  },
  "oklch": {
    "l": 0.54304,
    "c": 0.11798,
    "h": 249.7
  },
  "luminance": 0.16089
}

Semantic roles & 50–950 ramp

primary

#3173B1

secondary

#C59E79

accent

#9248E0

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #3173B1

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

Preview Lab → · Contrast checker → · Palette generator →