#3779DD#3779DD

#3779DD is a mid, vivid blue. Relative luminance 0.197; OKLCH L 58.6% C 0.167 H 258.7°. Best body text is #000000 at 4.94:1 contrast (WCAG AA passes).

Color values

HEX	#3779DD
RGB	rgb(55, 121, 221)
HSL	hsl(216, 71%, 54%)
HSV	hsv(216, 75%, 87%)
CMYK	cmyk(75.1%, 45.2%, 0%, 13.3%)
CIE-LAB	lab(51.50, 13.50, -57.10)
CIE-LCH	lch(51.50, 58.68, 283.30°)
OKLab	oklab(58.6% -0.0326 -0.1637)
OKLCH	oklch(58.6% 0.167 258.7)
XYZ	xyz(21.4593, 19.7050, 71.0651)
Luminance	0.1971 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3779DD #DD9B37

analogous

#37CCDD #3779DD #4837DD

triadic

#3779DD #DD3779 #79DD37

tetradic

#3779DD #DD37CC #DD9B37 #37DD48

square

#3779DD #DD37CC #DD9B37 #37DD48

split-complementary

#3779DD #DD4837 #CCDD37

monochromatic

#164283 #1F5CB8 #3779DD #6B9CE6 #A0BFEF

Accessibility & contrast

On white

4.25

#3779DD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.94

#3779DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3779DD

4.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3779DD	#FFFFFF	#000000	##000000
##3779DD	1.00	4.25	4.94	4.94
#FFFFFF	4.25	1.00	21.00	21.00
#000000	4.94	21.00	1.00	1.00
##000000	4.94	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4583E1

Deuteranopia (green-blind)

#1F74DB

Tritanopia (blue-blind)

#0091A0

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #3779dd;
/* rgb */ color: rgb(55, 121, 221);
/* oklch */ color: oklch(58.6% 0.167 258.7);

Tailwind

colors: {
  custom: {
    50: '#849fe8',
    500: '#3779dd',
    950: '#000000',
  },
}

SCSS

$custom: #3779dd;
$custom-light: #849fe8;
$custom-dark: #000000;

JSON

{
  "hex": "#3779dd",
  "rgb": {
    "r": 55,
    "g": 121,
    "b": 221
  },
  "hsl": {
    "h": 216.145,
    "s": 70.94,
    "l": 54.118
  },
  "oklch": {
    "l": 0.58601,
    "c": 0.16695,
    "h": 258.7
  },
  "luminance": 0.19707
}

Semantic roles & 50–950 ramp

primary

#3779DD

secondary

#DBBF95

accent

#A63AEE

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #3779DD

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

Preview Lab → · Contrast checker → · Palette generator →