#3779BB#3779BB

#3779BB is a mid, vivid cyan. Relative luminance 0.181; OKLCH L 56.5% C 0.123 H 250.9°. Best body text is #000000 at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#3779BB
RGB	rgb(55, 121, 187)
HSL	hsl(210, 55%, 47%)
HSV	hsv(210, 71%, 73%)
CMYK	cmyk(70.6%, 35.3%, 0%, 26.7%)
CIE-LAB	lab(49.58, 1.10, -40.79)
CIE-LCH	lch(49.58, 40.80, 271.55°)
OKLab	oklab(56.49% -0.0401 -0.1158)
OKLCH	oklch(56.49% 0.123 250.9)
XYZ	xyz(17.3792, 18.0729, 49.5766)
Luminance	0.1807 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3779BB #BB7937

analogous

#37BBBB #3779BB #3737BB

triadic

#3779BB #BB3779 #79BB37

tetradic

#3779BB #BB37BB #BB7937 #37BB37

square

#3779BB #BB37BB #BB7937 #37BB37

split-complementary

#3779BB #BB3737 #BBBB37

monochromatic

#1B3C5C #295A8C #3779BB #5F98D0 #8EB6DE

Accessibility & contrast

On white

4.55

#3779BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.62

#3779BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3779BB

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3779BB	#FFFFFF	#000000	##000000
##3779BB	1.00	4.55	4.62	4.62
#FFFFFF	4.55	1.00	21.00	21.00
#000000	4.62	21.00	1.00	1.00
##000000	4.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B7DBE

Deuteranopia (green-blind)

#4870BA

Tritanopia (blue-blind)

#008991

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3779bb;
/* rgb */ color: rgb(55, 121, 187);
/* oklch */ color: oklch(56.5% 0.123 250.9);

Tailwind

colors: {
  custom: {
    50: '#7d9fd0',
    500: '#3779bb',
    950: '#000000',
  },
}

SCSS

$custom: #3779bb;
$custom-light: #7d9fd0;
$custom-dark: #000000;

JSON

{
  "hex": "#3779bb",
  "rgb": {
    "r": 55,
    "g": 121,
    "b": 187
  },
  "hsl": {
    "h": 210,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.56488,
    "c": 0.1226,
    "h": 250.9
  },
  "luminance": 0.18075
}

Semantic roles & 50–950 ramp

primary

#3779BB

secondary

#C9A785

accent

#944ADE

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3779BB

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

Preview Lab → · Contrast checker → · Palette generator →