#3178B9#3178B9

#3178B9 is a mid, vivid cyan. Relative luminance 0.176; OKLCH L 55.9% C 0.123 H 249.3°. Best body text is #FFFFFF at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#3178B9
RGB	rgb(49, 120, 185)
HSL	hsl(209, 58%, 46%)
HSV	hsv(209, 74%, 73%)
CMYK	cmyk(73.5%, 35.1%, 0%, 27.5%)
CIE-LAB	lab(48.99, 0.12, -40.59)
CIE-LCH	lch(48.99, 40.59, 270.17°)
OKLab	oklab(55.93% -0.0435 -0.1153)
OKLCH	oklch(55.93% 0.123 249.3)
XYZ	xyz(16.7367, 17.5868, 48.4021)
Luminance	0.1759 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3178B9 #B97231

analogous

#31B9B6 #3178B9 #3134B9

triadic

#3178B9 #B93178 #78B931

tetradic

#3178B9 #B631B9 #B97231 #34B931

square

#3178B9 #B631B9 #B97231 #34B931

split-complementary

#3178B9 #B93134 #B9B631

monochromatic

#173958 #245989 #3178B9 #5596D2 #86B4DF

Accessibility & contrast

On white

4.65

#3178B9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.52

#3178B9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3178B9

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3178B9	#FFFFFF	#000000	##FFFFFF
##3178B9	1.00	4.65	4.52	4.65
#FFFFFF	4.65	1.00	21.00	1.00
#000000	4.52	21.00	1.00	21.00
##FFFFFF	4.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A7BBC

Deuteranopia (green-blind)

#476FB8

Tritanopia (blue-blind)

#008790

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3178b9;
/* rgb */ color: rgb(49, 120, 185);
/* oklch */ color: oklch(55.9% 0.123 249.3);

Tailwind

colors: {
  custom: {
    50: '#7b9ece',
    500: '#3178b9',
    950: '#000000',
  },
}

SCSS

$custom: #3178b9;
$custom-light: #7b9ece;
$custom-dark: #000000;

JSON

{
  "hex": "#3178b9",
  "rgb": {
    "r": 49,
    "g": 120,
    "b": 185
  },
  "hsl": {
    "h": 208.676,
    "s": 58.12,
    "l": 45.882
  },
  "oklch": {
    "l": 0.55934,
    "c": 0.12328,
    "h": 249.3
  },
  "luminance": 0.17589
}

Semantic roles & 50–950 ramp

primary

#3178B9

secondary

#C8A17D

accent

#9046E1

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3178B9

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

Preview Lab → · Contrast checker → · Palette generator →