#3178AA#3178AA

#3178AA is a mid, moderate cyan. Relative luminance 0.170; OKLCH L 55.1% C 0.105 H 242.8°. Best body text is #FFFFFF at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#3178AA
RGB	rgb(49, 120, 170)
HSL	hsl(205, 55%, 43%)
HSV	hsv(205, 71%, 67%)
CMYK	cmyk(71.2%, 29.4%, 0%, 33.3%)
CIE-LAB	lab(48.24, -5.30, -33.07)
CIE-LCH	lch(48.24, 33.49, 260.90°)
OKLab	oklab(55.1% -0.048 -0.0934)
OKLCH	oklch(55.1% 0.105 242.8)
XYZ	xyz(15.2360, 16.9865, 40.4982)
Luminance	0.1699 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3178AA #AA6331

analogous

#31AA9F #3178AA #313CAA

triadic

#3178AA #AA3178 #78AA31

tetradic

#3178AA #9F31AA #AA6331 #3CAA31

square

#3178AA #9F31AA #AA6331 #3CAA31

split-complementary

#3178AA #AA313C #AA9F31

monochromatic

#16354B #23567A #3178AA #4D97CC #7CB3D9

Accessibility & contrast

On white

4.78

#3178AA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#3178AA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3178AA

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3178AA	#FFFFFF	#000000	##FFFFFF
##3178AA	1.00	4.78	4.40	4.78
#FFFFFF	4.78	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6179AC

Deuteranopia (green-blind)

#516DA9

Tritanopia (blue-blind)

#00848A

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3178aa;
/* rgb */ color: rgb(49, 120, 170);
/* oklch */ color: oklch(55.1% 0.105 242.8);

Tailwind

colors: {
  custom: {
    50: '#789ec3',
    500: '#3178aa',
    950: '#000000',
  },
}

SCSS

$custom: #3178aa;
$custom-light: #789ec3;
$custom-dark: #000000;

JSON

{
  "hex": "#3178aa",
  "rgb": {
    "r": 49,
    "g": 120,
    "b": 170
  },
  "hsl": {
    "h": 204.793,
    "s": 55.251,
    "l": 42.941
  },
  "oklch": {
    "l": 0.551,
    "c": 0.10503,
    "h": 242.8
  },
  "luminance": 0.16988
}

Semantic roles & 50–950 ramp

primary

#3178AA

secondary

#C29575

accent

#8749DF

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0E12

muted

#7C7E81

Preview Lab

Preview with #3178AA

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

Preview Lab → · Contrast checker → · Palette generator →