#3879DD#3879DD

#3879DD is a mid, vivid blue. Relative luminance 0.197; OKLCH L 58.6% C 0.167 H 258.9°. Best body text is #000000 at 4.95:1 contrast (WCAG AA passes).

Color values

HEX	#3879DD
RGB	rgb(56, 121, 221)
HSL	hsl(216, 71%, 54%)
HSV	hsv(216, 75%, 87%)
CMYK	cmyk(74.7%, 45.2%, 0%, 13.3%)
CIE-LAB	lab(51.53, 13.62, -57.05)
CIE-LCH	lch(51.53, 58.65, 283.43°)
OKLab	oklab(58.64% -0.032 -0.1636)
OKLCH	oklch(58.64% 0.167 258.9)
XYZ	xyz(21.5147, 19.7335, 71.0677)
Luminance	0.1974 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3879DD #DD9C38

analogous

#38CBDD #3879DD #4A38DD

triadic

#3879DD #DD3879 #79DD38

tetradic

#3879DD #DD38CB #DD9C38 #38DD4A

square

#3879DD #DD38CB #DD9C38 #38DD4A

split-complementary

#3879DD #DD4A38 #CBDD38

monochromatic

#174284 #1F5CB8 #3879DD #6C9CE6 #A1BFEF

Accessibility & contrast

On white

4.24

#3879DD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.95

#3879DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3879DD

4.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3879DD	#FFFFFF	#000000	##000000
##3879DD	1.00	4.24	4.95	4.95
#FFFFFF	4.24	1.00	21.00	21.00
#000000	4.95	21.00	1.00	1.00
##000000	4.95	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4583E1

Deuteranopia (green-blind)

#2074DB

Tritanopia (blue-blind)

#0091A0

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #3879dd;
/* rgb */ color: rgb(56, 121, 221);
/* oklch */ color: oklch(58.6% 0.167 258.9);

Tailwind

colors: {
  custom: {
    50: '#849fe8',
    500: '#3879dd',
    950: '#000000',
  },
}

SCSS

$custom: #3879dd;
$custom-light: #849fe8;
$custom-dark: #000000;

JSON

{
  "hex": "#3879dd",
  "rgb": {
    "r": 56,
    "g": 121,
    "b": 221
  },
  "hsl": {
    "h": 216.364,
    "s": 70.815,
    "l": 54.314
  },
  "oklch": {
    "l": 0.58635,
    "c": 0.16666,
    "h": 258.9
  },
  "luminance": 0.19736
}

Semantic roles & 50–950 ramp

primary

#3879DD

secondary

#DBC095

accent

#A73AEE

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #3879DD

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

Preview Lab → · Contrast checker → · Palette generator →