#3778BC#3778BC

#3778BC is a mid, vivid cyan. Relative luminance 0.179; OKLCH L 56.3% C 0.125 H 251.9°. Best body text is #FFFFFF at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#3778BC
RGB	rgb(55, 120, 188)
HSL	hsl(211, 55%, 48%)
HSV	hsv(211, 71%, 74%)
CMYK	cmyk(70.7%, 36.2%, 0%, 26.3%)
CIE-LAB	lab(49.34, 2.07, -41.74)
CIE-LCH	lch(49.34, 41.80, 272.84°)
OKLab	oklab(56.32% -0.0389 -0.1187)
OKLCH	oklch(56.32% 0.125 251.9)
XYZ	xyz(17.3657, 17.8741, 50.1020)
Luminance	0.1788 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3778BC #BC7B37

analogous

#37BABC #3778BC #3937BC

triadic

#3778BC #BC3778 #78BC37

tetradic

#3778BC #BC37BA #BC7B37 #37BC39

square

#3778BC #BC37BA #BC7B37 #37BC39

split-complementary

#3778BC #BC3937 #BABC37

monochromatic

#1B3C5D #295A8D #3778BC #6097D0 #8FB6DE

Accessibility & contrast

On white

4.59

#3778BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.58

#3778BC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3778BC

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3778BC	#FFFFFF	#000000	##FFFFFF
##3778BC	1.00	4.59	4.58	4.59
#FFFFFF	4.59	1.00	21.00	1.00
#000000	4.58	21.00	1.00	21.00
##FFFFFF	4.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#597CBF

Deuteranopia (green-blind)

#4670BB

Tritanopia (blue-blind)

#008891

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3778bc;
/* rgb */ color: rgb(55, 120, 188);
/* oklch */ color: oklch(56.3% 0.125 251.9);

Tailwind

colors: {
  custom: {
    50: '#7e9ed0',
    500: '#3778bc',
    950: '#000000',
  },
}

SCSS

$custom: #3778bc;
$custom-light: #7e9ed0;
$custom-dark: #000000;

JSON

{
  "hex": "#3778bc",
  "rgb": {
    "r": 55,
    "g": 120,
    "b": 188
  },
  "hsl": {
    "h": 210.677,
    "s": 54.733,
    "l": 47.647
  },
  "oklch": {
    "l": 0.56316,
    "c": 0.12488,
    "h": 251.9
  },
  "luminance": 0.17876
}

Semantic roles & 50–950 ramp

primary

#3778BC

secondary

#C9A886

accent

#964ADE

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3778BC

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

Preview Lab → · Contrast checker → · Palette generator →