#3873DD#3873DD

#3873DD is a mid, vivid blue. Relative luminance 0.183; OKLCH L 57.4% C 0.174 H 261.0°. Best body text is #000000 at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#3873DD
RGB	rgb(56, 115, 221)
HSL	hsl(219, 71%, 54%)
HSV	hsv(219, 75%, 87%)
CMYK	cmyk(74.7%, 48%, 0%, 13.3%)
CIE-LAB	lab(49.88, 17.37, -59.71)
CIE-LCH	lch(49.88, 62.18, 286.22°)
OKLab	oklab(57.37% -0.0271 -0.1715)
OKLCH	oklch(57.37% 0.174 261)
XYZ	xyz(20.8081, 18.3203, 70.8321)
Luminance	0.1832 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3873DD #DDA238

analogous

#38C6DD #3873DD #5038DD

triadic

#3873DD #DD3873 #73DD38

tetradic

#3873DD #DD38C6 #DDA238 #38DD50

square

#3873DD #DD38C6 #DDA238 #38DD50

split-complementary

#3873DD #DD5038 #C6DD38

monochromatic

#173E84 #1F56B8 #3873DD #6C98E6 #A1BDEF

Accessibility & contrast

On white

4.50

#3873DD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.66

#3873DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3873DD

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3873DD	#FFFFFF	#000000	##000000
##3873DD	1.00	4.50	4.66	4.66
#FFFFFF	4.50	1.00	21.00	21.00
#000000	4.66	21.00	1.00	1.00
##000000	4.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#377FE1

Deuteranopia (green-blind)

#0070DB

Tritanopia (blue-blind)

#008C9D

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3873dd;
/* rgb */ color: rgb(56, 115, 221);
/* oklch */ color: oklch(57.4% 0.174 261.0);

Tailwind

colors: {
  custom: {
    50: '#849ae8',
    500: '#3873dd',
    950: '#000000',
  },
}

SCSS

$custom: #3873dd;
$custom-light: #849ae8;
$custom-dark: #000000;

JSON

{
  "hex": "#3873dd",
  "rgb": {
    "r": 56,
    "g": 115,
    "b": 221
  },
  "hsl": {
    "h": 218.545,
    "s": 70.815,
    "l": 54.314
  },
  "oklch": {
    "l": 0.57365,
    "c": 0.17362,
    "h": 261
  },
  "luminance": 0.18323
}

Semantic roles & 50–950 ramp

primary

#3873DD

secondary

#DBC295

accent

#AD3AEE

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0D0E16

muted

#7D7E84

Preview Lab

Preview with #3873DD

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

Preview Lab → · Contrast checker → · Palette generator →