#3178B5#3178B5

#3178B5 is a mid, moderate cyan. Relative luminance 0.174; OKLCH L 55.7% C 0.118 H 247.8°. Best body text is #FFFFFF at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#3178B5
RGB	rgb(49, 120, 181)
HSL	hsl(208, 57%, 45%)
HSV	hsv(208, 73%, 71%)
CMYK	cmyk(72.9%, 33.7%, 0%, 29%)
CIE-LAB	lab(48.79, -1.34, -38.60)
CIE-LCH	lch(48.79, 38.62, 268.01°)
OKLab	oklab(55.71% -0.0446 -0.1095)
OKLCH	oklch(55.71% 0.118 247.8)
XYZ	xyz(16.3204, 17.4203, 46.2094)
Luminance	0.1742 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3178B5 #B56E31

analogous

#31B5B0 #3178B5 #3136B5

triadic

#3178B5 #B53178 #78B531

tetradic

#3178B5 #B031B5 #B56E31 #36B531

square

#3178B5 #B031B5 #B56E31 #36B531

split-complementary

#3178B5 #B53136 #B5B031

monochromatic

#173855 #245885 #3178B5 #5396D0 #83B4DD

Accessibility & contrast

On white

4.68

#3178B5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.48

#3178B5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3178B5

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3178B5	#FFFFFF	#000000	##FFFFFF
##3178B5	1.00	4.68	4.48	4.68
#FFFFFF	4.68	1.00	21.00	1.00
#000000	4.48	21.00	1.00	21.00
##FFFFFF	4.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C7BB8

Deuteranopia (green-blind)

#4A6EB4

Tritanopia (blue-blind)

#00878E

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3178b5;
/* rgb */ color: rgb(49, 120, 181);
/* oklch */ color: oklch(55.7% 0.118 247.8);

Tailwind

colors: {
  custom: {
    50: '#7a9ecb',
    500: '#3178b5',
    950: '#000000',
  },
}

SCSS

$custom: #3178b5;
$custom-light: #7a9ecb;
$custom-dark: #000000;

JSON

{
  "hex": "#3178b5",
  "rgb": {
    "r": 49,
    "g": 120,
    "b": 181
  },
  "hsl": {
    "h": 207.727,
    "s": 57.391,
    "l": 45.098
  },
  "oklch": {
    "l": 0.55705,
    "c": 0.11829,
    "h": 247.8
  },
  "luminance": 0.17422
}

Semantic roles & 50–950 ramp

primary

#3178B5

secondary

#C79E7B

accent

#8E47E1

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #3178B5

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

Preview Lab → · Contrast checker → · Palette generator →