#3178BB#3178BB

#3178BB is a mid, vivid cyan. Relative luminance 0.177; OKLCH L 56.0% C 0.126 H 250.0°. Best body text is #FFFFFF at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#3178BB
RGB	rgb(49, 120, 187)
HSL	hsl(209, 58%, 46%)
HSV	hsv(209, 74%, 73%)
CMYK	cmyk(73.8%, 35.8%, 0%, 26.7%)
CIE-LAB	lab(49.10, 0.85, -41.57)
CIE-LCH	lch(49.10, 41.58, 271.17°)
OKLab	oklab(56.05% -0.043 -0.1182)
OKLCH	oklch(56.05% 0.126 250)
XYZ	xyz(16.9494, 17.6718, 49.5218)
Luminance	0.1767 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3178BB #BB7431

analogous

#31BBB9 #3178BB #3133BB

triadic

#3178BB #BB3178 #78BB31

tetradic

#3178BB #B931BB #BB7431 #33BB31

square

#3178BB #B931BB #BB7431 #33BB31

split-complementary

#3178BB #BB3133 #BBB931

monochromatic

#183A5A #24598B #3178BB #5696D3 #87B4E0

Accessibility & contrast

On white

4.63

#3178BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.53

#3178BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3178BB

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3178BB	#FFFFFF	#000000	##FFFFFF
##3178BB	1.00	4.63	4.53	4.63
#FFFFFF	4.63	1.00	21.00	1.00
#000000	4.53	21.00	1.00	21.00
##FFFFFF	4.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#597CBE

Deuteranopia (green-blind)

#456FBA

Tritanopia (blue-blind)

#008890

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3178bb;
/* rgb */ color: rgb(49, 120, 187);
/* oklch */ color: oklch(56.0% 0.126 250.0);

Tailwind

colors: {
  custom: {
    50: '#7b9ed0',
    500: '#3178bb',
    950: '#000000',
  },
}

SCSS

$custom: #3178bb;
$custom-light: #7b9ed0;
$custom-dark: #000000;

JSON

{
  "hex": "#3178bb",
  "rgb": {
    "r": 49,
    "g": 120,
    "b": 187
  },
  "hsl": {
    "h": 209.13,
    "s": 58.475,
    "l": 46.275
  },
  "oklch": {
    "l": 0.5605,
    "c": 0.1258,
    "h": 250
  },
  "luminance": 0.17674
}

Semantic roles & 50–950 ramp

primary

#3178BB

secondary

#C9A37F

accent

#9246E2

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3178BB

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

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