#3178B8#3178B8

#3178B8 is a mid, vivid cyan. Relative luminance 0.175; OKLCH L 55.9% C 0.122 H 249.0°. Best body text is #FFFFFF at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#3178B8
RGB	rgb(49, 120, 184)
HSL	hsl(208, 58%, 46%)
HSV	hsv(208, 73%, 72%)
CMYK	cmyk(73.4%, 34.8%, 0%, 27.8%)
CIE-LAB	lab(48.94, -0.25, -40.09)
CIE-LCH	lch(48.94, 40.09, 269.65°)
OKLab	oklab(55.88% -0.0438 -0.1139)
OKLCH	oklch(55.88% 0.122 249)
XYZ	xyz(16.6316, 17.5447, 47.8480)
Luminance	0.1755 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3178B8 #B87131

analogous

#31B8B4 #3178B8 #3135B8

triadic

#3178B8 #B83178 #78B831

tetradic

#3178B8 #B431B8 #B87131 #35B831

square

#3178B8 #B431B8 #B87131 #35B831

split-complementary

#3178B8 #B83135 #B8B431

monochromatic

#173957 #245888 #3178B8 #5596D2 #85B4DE

Accessibility & contrast

On white

4.66

#3178B8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.51

#3178B8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3178B8

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3178B8	#FFFFFF	#000000	##FFFFFF
##3178B8	1.00	4.66	4.51	4.66
#FFFFFF	4.66	1.00	21.00	1.00
#000000	4.51	21.00	1.00	21.00
##FFFFFF	4.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B7BBB

Deuteranopia (green-blind)

#476FB7

Tritanopia (blue-blind)

#00878F

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3178b8;
/* rgb */ color: rgb(49, 120, 184);
/* oklch */ color: oklch(55.9% 0.122 249.0);

Tailwind

colors: {
  custom: {
    50: '#7b9ecd',
    500: '#3178b8',
    950: '#000000',
  },
}

SCSS

$custom: #3178b8;
$custom-light: #7b9ecd;
$custom-dark: #000000;

JSON

{
  "hex": "#3178b8",
  "rgb": {
    "r": 49,
    "g": 120,
    "b": 184
  },
  "hsl": {
    "h": 208.444,
    "s": 57.94,
    "l": 45.686
  },
  "oklch": {
    "l": 0.55876,
    "c": 0.12202,
    "h": 249
  },
  "luminance": 0.17547
}

Semantic roles & 50–950 ramp

primary

#3178B8

secondary

#C8A07D

accent

#9047E1

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3178B8

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

Preview Lab → · Contrast checker → · Palette generator →