#3178B3#3178B3

#3178B3 is a mid, moderate cyan. Relative luminance 0.173; OKLCH L 55.6% C 0.116 H 247.0°. Best body text is #FFFFFF at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#3178B3
RGB	rgb(49, 120, 179)
HSL	hsl(207, 57%, 45%)
HSV	hsv(207, 73%, 70%)
CMYK	cmyk(72.6%, 33%, 0%, 29.8%)
CIE-LAB	lab(48.68, -2.06, -37.60)
CIE-LCH	lch(48.68, 37.66, 266.86°)
OKLab	oklab(55.59% -0.0452 -0.1066)
OKLCH	oklch(55.59% 0.116 247)
XYZ	xyz(16.1167, 17.3388, 45.1364)
Luminance	0.1734 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3178B3 #B36C31

analogous

#31B3AD #3178B3 #3137B3

triadic

#3178B3 #B33178 #78B331

tetradic

#3178B3 #AD31B3 #B36C31 #37B331

square

#3178B3 #AD31B3 #B36C31 #37B331

split-complementary

#3178B3 #B33137 #B3AD31

monochromatic

#173853 #245883 #3178B3 #5296D0 #82B3DD

Accessibility & contrast

On white

4.70

#3178B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.47

#3178B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3178B3

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3178B3	#FFFFFF	#000000	##FFFFFF
##3178B3	1.00	4.70	4.47	4.70
#FFFFFF	4.70	1.00	21.00	1.00
#000000	4.47	21.00	1.00	21.00
##FFFFFF	4.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D7AB6

Deuteranopia (green-blind)

#4B6EB2

Tritanopia (blue-blind)

#00868D

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3178b3;
/* rgb */ color: rgb(49, 120, 179);
/* oklch */ color: oklch(55.6% 0.116 247.0);

Tailwind

colors: {
  custom: {
    50: '#7a9eca',
    500: '#3178b3',
    950: '#000000',
  },
}

SCSS

$custom: #3178b3;
$custom-light: #7a9eca;
$custom-dark: #000000;

JSON

{
  "hex": "#3178b3",
  "rgb": {
    "r": 49,
    "g": 120,
    "b": 179
  },
  "hsl": {
    "h": 207.231,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.55592,
    "c": 0.11583,
    "h": 247
  },
  "luminance": 0.17341
}

Semantic roles & 50–950 ramp

primary

#3178B3

secondary

#C69C7A

accent

#8D48E0

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #3178B3

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

Preview Lab → · Contrast checker → · Palette generator →