#3777BB#3777BB

#3777BB is a mid, vivid cyan. Relative luminance 0.176; OKLCH L 56.0% C 0.125 H 252.2°. Best body text is #FFFFFF at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#3777BB
RGB	rgb(55, 119, 187)
HSL	hsl(211, 55%, 47%)
HSV	hsv(211, 71%, 73%)
CMYK	cmyk(70.6%, 36.4%, 0%, 26.7%)
CIE-LAB	lab(49.00, 2.32, -41.72)
CIE-LCH	lch(49.00, 41.78, 273.18°)
OKLab	oklab(56.03% -0.0382 -0.1186)
OKLCH	oklch(56.03% 0.125 252.2)
XYZ	xyz(17.1387, 17.5919, 49.4964)
Luminance	0.1759 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3777BB #BB7B37

analogous

#37B9BB #3777BB #3937BB

triadic

#3777BB #BB3777 #77BB37

tetradic

#3777BB #BB37B9 #BB7B37 #37BB39

square

#3777BB #BB37B9 #BB7B37 #37BB39

split-complementary

#3777BB #BB3937 #B9BB37

monochromatic

#1B3B5C #29598C #3777BB #5F96D0 #8EB5DE

Accessibility & contrast

On white

4.65

#3777BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.52

#3777BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3777BB

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3777BB	#FFFFFF	#000000	##FFFFFF
##3777BB	1.00	4.65	4.52	4.65
#FFFFFF	4.65	1.00	21.00	1.00
#000000	4.52	21.00	1.00	21.00
##FFFFFF	4.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#587BBE

Deuteranopia (green-blind)

#456FBA

Tritanopia (blue-blind)

#008790

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3777bb;
/* rgb */ color: rgb(55, 119, 187);
/* oklch */ color: oklch(56.0% 0.125 252.2);

Tailwind

colors: {
  custom: {
    50: '#7d9dd0',
    500: '#3777bb',
    950: '#000000',
  },
}

SCSS

$custom: #3777bb;
$custom-light: #7d9dd0;
$custom-dark: #000000;

JSON

{
  "hex": "#3777bb",
  "rgb": {
    "r": 55,
    "g": 119,
    "b": 187
  },
  "hsl": {
    "h": 210.909,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.56028,
    "c": 0.12459,
    "h": 252.2
  },
  "luminance": 0.17594
}

Semantic roles & 50–950 ramp

primary

#3777BB

secondary

#C9A885

accent

#964ADE

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3777BB

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

Preview Lab → · Contrast checker → · Palette generator →