#3778CB#3778CB

#3778CB is a mid, vivid cyan. Relative luminance 0.186; OKLCH L 57.2% C 0.144 H 255.9°. Best body text is #000000 at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#3778CB
RGB	rgb(55, 120, 203)
HSL	hsl(214, 59%, 51%)
HSV	hsv(214, 73%, 80%)
CMYK	cmyk(72.9%, 40.9%, 0%, 20.4%)
CIE-LAB	lab(50.16, 7.52, -49.04)
CIE-LCH	lch(50.16, 49.61, 278.71°)
OKLab	oklab(57.22% -0.0353 -0.14)
OKLCH	oklch(57.22% 0.144 255.9)
XYZ	xyz(19.0675, 18.5549, 59.0649)
Luminance	0.1856 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3778CB #CB8A37

analogous

#37C2CB #3778CB #4037CB

triadic

#3778CB #CB3778 #78CB37

tetradic

#3778CB #CB37C2 #CB8A37 #37CB40

square

#3778CB #CB37C2 #CB8A37 #37CB40

split-complementary

#3778CB #CB4037 #C2CB37

monochromatic

#1C3F6C #295B9C #3778CB #6899D8 #98BAE4

Accessibility & contrast

On white

4.46

#3778CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.71

#3778CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3778CB

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3778CB	#FFFFFF	#000000	##000000
##3778CB	1.00	4.46	4.71	4.71
#FFFFFF	4.46	1.00	21.00	21.00
#000000	4.71	21.00	1.00	1.00
##000000	4.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#507FCE

Deuteranopia (green-blind)

#3871C9

Tritanopia (blue-blind)

#008B97

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3778cb;
/* rgb */ color: rgb(55, 120, 203);
/* oklch */ color: oklch(57.2% 0.144 255.9);

Tailwind

colors: {
  custom: {
    50: '#809edb',
    500: '#3778cb',
    950: '#000000',
  },
}

SCSS

$custom: #3778cb;
$custom-light: #809edb;
$custom-dark: #000000;

JSON

{
  "hex": "#3778cb",
  "rgb": {
    "r": 55,
    "g": 120,
    "b": 203
  },
  "hsl": {
    "h": 213.649,
    "s": 58.73,
    "l": 50.588
  },
  "oklch": {
    "l": 0.57222,
    "c": 0.14443,
    "h": 255.9
  },
  "luminance": 0.18557
}

Semantic roles & 50–950 ramp

primary

#3778CB

secondary

#D0B38E

accent

#9D46E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3778CB

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

Preview Lab → · Contrast checker → · Palette generator →