#3870DD#3870DD

#3870DD is a mid, vivid blue. Relative luminance 0.176; OKLCH L 56.7% C 0.177 H 262.0°. Best body text is #FFFFFF at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#3870DD
RGB	rgb(56, 112, 221)
HSL	hsl(220, 71%, 54%)
HSV	hsv(220, 75%, 87%)
CMYK	cmyk(74.7%, 49.3%, 0%, 13.3%)
CIE-LAB	lab(49.07, 19.26, -61.02)
CIE-LCH	lch(49.07, 63.99, 287.52°)
OKLab	oklab(56.74% -0.0247 -0.1754)
OKLCH	oklch(56.74% 0.177 262)
XYZ	xyz(20.4715, 17.6473, 70.7199)
Luminance	0.1765 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3870DD #DDA538

analogous

#38C3DD #3870DD #5338DD

triadic

#3870DD #DD3870 #70DD38

tetradic

#3870DD #DD38C3 #DDA538 #38DD53

square

#3870DD #DD38C3 #DDA538 #38DD53

split-complementary

#3870DD #DD5338 #C3DD38

monochromatic

#173C84 #1F53B8 #3870DD #6C96E6 #A1BBEF

Accessibility & contrast

On white

4.64

#3870DD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.53

#3870DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3870DD

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3870DD	#FFFFFF	#000000	##FFFFFF
##3870DD	1.00	4.64	4.53	4.64
#FFFFFF	4.64	1.00	21.00	1.00
#000000	4.53	21.00	1.00	21.00
##FFFFFF	4.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F7DE1

Deuteranopia (green-blind)

#006DDB

Tritanopia (blue-blind)

#008A9C

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3870dd;
/* rgb */ color: rgb(56, 112, 221);
/* oklch */ color: oklch(56.7% 0.177 262.0);

Tailwind

colors: {
  custom: {
    50: '#8598e8',
    500: '#3870dd',
    950: '#000000',
  },
}

SCSS

$custom: #3870dd;
$custom-light: #8598e8;
$custom-dark: #000000;

JSON

{
  "hex": "#3870dd",
  "rgb": {
    "r": 56,
    "g": 112,
    "b": 221
  },
  "hsl": {
    "h": 219.636,
    "s": 70.815,
    "l": 54.314
  },
  "oklch": {
    "l": 0.56739,
    "c": 0.17715,
    "h": 262
  },
  "luminance": 0.1765
}

Semantic roles & 50–950 ramp

primary

#3870DD

secondary

#DBC495

accent

#B13AEE

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0D0D16

muted

#7D7E84

Preview Lab

Preview with #3870DD

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

Preview Lab → · Contrast checker → · Palette generator →