#3779CC#3779CC

#3779CC is a mid, vivid cyan. Relative luminance 0.188; OKLCH L 57.5% C 0.145 H 255.6°. Best body text is #000000 at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#3779CC
RGB	rgb(55, 121, 204)
HSL	hsl(213, 59%, 51%)
HSV	hsv(213, 73%, 80%)
CMYK	cmyk(73%, 40.7%, 0%, 20%)
CIE-LAB	lab(50.50, 7.27, -49.06)
CIE-LCH	lch(50.50, 49.60, 278.42°)
OKLab	oklab(57.51% -0.036 -0.1401)
OKLCH	oklch(57.51% 0.145 255.6)
XYZ	xyz(19.3080, 18.8445, 59.7348)
Luminance	0.1885 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3779CC #CC8A37

analogous

#37C3CC #3779CC #3F37CC

triadic

#3779CC #CC3779 #79CC37

tetradic

#3779CC #CC37C3 #CC8A37 #37CC3F

square

#3779CC #CC37C3 #CC8A37 #37CC3F

split-complementary

#3779CC #CC3F37 #C3CC37

monochromatic

#1C406D #285C9E #3779CC #689AD8 #99BAE5

Accessibility & contrast

On white

4.40

#3779CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.77

#3779CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3779CC

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3779CC	#FFFFFF	#000000	##000000
##3779CC	1.00	4.40	4.77	4.77
#FFFFFF	4.40	1.00	21.00	21.00
#000000	4.77	21.00	1.00	1.00
##000000	4.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5280CF

Deuteranopia (green-blind)

#3972CA

Tritanopia (blue-blind)

#008C98

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #3779cc;
/* rgb */ color: rgb(55, 121, 204);
/* oklch */ color: oklch(57.5% 0.145 255.6);

Tailwind

colors: {
  custom: {
    50: '#819fdc',
    500: '#3779cc',
    950: '#000000',
  },
}

SCSS

$custom: #3779cc;
$custom-light: #819fdc;
$custom-dark: #000000;

JSON

{
  "hex": "#3779cc",
  "rgb": {
    "r": 55,
    "g": 121,
    "b": 204
  },
  "hsl": {
    "h": 213.423,
    "s": 59.363,
    "l": 50.784
  },
  "oklch": {
    "l": 0.57506,
    "c": 0.14465,
    "h": 255.6
  },
  "luminance": 0.18847
}

Semantic roles & 50–950 ramp

primary

#3779CC

secondary

#D0B38E

accent

#9D45E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3779CC

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

Preview Lab → · Contrast checker → · Palette generator →